PALIURUS.

PALIURUS ACULEATUS (syn P. australis).—Christ's Thorn, or Garden Thorn. Mediterranean region, 1596. A densely-branched, spiny shrub, with small leaves, and not very showy, yellowish-green flowers. It grows and flowers freely enough in light, peaty earth, but is not very hardy, the tips of the branches being usually killed back should the winter be at all severe.

PARROTIA.

PARROTIA PERSICA.—Persia, 1848. Well known for the lovely autumnal tints displayed by the foliage when dying off. But for the flowers, too, it is well worthy of culture, the crimson-tipped stamens of the male flowers being singularly beautiful and uncommon. In February it is no unusual sight to see on well-established plants whole branches that are profusely furnished with these showy flowers. For planting in a warm corner of a rather dry border it seems to be well suited; but it is perfectly hardy and free of growth when suited with soil and site. It is as yet rare in cultivation, but is sure, when better known and more widely disseminated, to become a general favourite with lovers of hardy shrubs.

PASSIFLORA.

PASSIFLORA CAERULEA.—Passion Flower. Brazil and Peru, 1699. Though not perfectly hardy, yet this handsome climbing plant, if cut down to the ground, usually shoots up freely again in the spring. The flowers, which are produced very freely, but particularly in maritime districts, vary from white to blue, and the prettily-fringed corona and centre of the flower render the whole peculiarly interesting and beautiful. P. caerulea Constance Elliott has greenish-white flowers; and P. caerulea Colvillei has white sepals and a blue fringe. The latter is of more robust growth, and more floriferous than the species.

PAULOWNIA.

PAULOWNIA IMPERIALIS.—Japan, 1840. This is a handsome, fast-growing tree, and one that is particularly valuable for its ample foliage, and distinct and showy flowers. Though perfectly hardy, in other respects it is unfortunate that the season at which the Paulownia flowers is so early that, unless the conditions are unusually favourable, the flower buds get destroyed by the frost. The tree grows to fully 40 feet high in this country, and is a grandly decorative object in its foliage alone, and for which, should the flowers never be produced, it is well worthy of cultivation. They are ovate-cordate, thickly covered with a grayish woolly tomentum, and often measure, but particularly in young and healthy trees, as much as 10 inches in length. The Foxglove-like flowers are purplish-violet and spotted, and borne in terminal panicles. They are sweetly-scented. When favourably situated, and in cool, sandy loam or peaty earth, the growth of the tree is very rapid, and when a tree has been cut over, the shoots sent out often exceed 6 feet in length in one season, and nearly 2 inches in diameter. There are many fine old trees throughout the country, and which testify to the general hardihood of the Paulownia.

PERIPLOCA.

PERIPLOCA GRAECA.—Poison Vine. South Eastern Europe, and Orient, 1597. A tall, climbing shrub, with small, ovate-lanceolate leaves, and clusters of curious purplish-brown, green-tipped flowers produced in summer. The long, incurved appendages, in the shape of a crown, and placed so as to protect the style and anthers, render the flowers of peculiar interest. Though often used as a greenhouse plant, it is perfectly hardy, and makes a neat, deciduous wall or arch covering, thriving to perfection in rich soil that is well-drained. It is readily propagated from cuttings.

PERNETTYA.

PERNETTYA MUCRONATA (syn Arbutus mucronata).—Prickly Heath. Magellan, 1828. This is a dwarf-growing, wiry shrub, with narrow, stiff leaves, and bears an abundance of white, bell-shaped flowers. It is a capital wind screen, and may be used to advantage on the exposed side of rockwork or flower beds, or as an ornamental shrub by the pond or lake side. The small dark-green leaves, the tiny white flowers, and great abundance of deep purple berries in winter, are all points that are in favour of the shrub for extended cultivation. The pretty, pinky shoots, too, help to make the plant attractive even in mid-winter. Propagation by layers or seed is readily brought about. To grow this shrub to perfection, peaty soil or decayed vegetable matter will be found most suitable. There is a narrow-leaved form named P. mucronata angustifolia, and another on which the name of P. mucronata speciosa has been bestowed.

There are many beautiful-berried forms of the Pernettya, but as their flowers are small can hardly be included in our list.

PHILADELPHUS.

PHILADELPHUS CORONARIUS.—Mock Orange, or Syringa. South Europe, 1596. A well-known and valuable garden shrub, of from 6 feet to 10 feet high, with ovate and serrulated leaves, and pretty racemes of white or yellowish-white, fragrant flowers. P. coronarius aureo-variegatus is one of the numerous forms of this shrub, having brightly-tinted, golden foliage, but the flowers are in no way superior to those of the parent. It is, if only for the foliage, an extremely pretty and distinct variety. P. coronarius argenteo-variegatus has silvery-tinted leaves; P. coronarius flore-pleno, full double flowers; and P. coronarius Keteleeri flore-pleno is the best double-flowered form in cultivation.

P. GORDONIANUS, an American species (1839), is a well-known and beautiful shrub, in which the flowers are usually double the size of those of the common species, and which are not produced till July, while those of P. coronarius appear in early May.

P. GRANDIFLORUS (syns P. floribundus, P. latifolius and P. speciosus).—Southern United States, 1811. This has rotundate, irregularly-toothed leaves, and large white, sweetly-scented flowers produced in clusters. This forms a stout bush 10 feet high, and as much through. There are two varieties, P. grandiflorus laxus, and P. grandiflorus speciosissimus, both distinct and pretty kinds.

P. HIRSUTUS.—North America, 1820. Another handsome, small-flowered species, of dwarf growth, and having hairy leaves.

P. INODOROUS, also from North America (1738), differs little in size and shape of flowers from P. grandiflorus, but the flowers are without scent. The leaves, too, are quite glabrous and obscurely toothed.

P. LEMOINEI BOULE D'ARGENT is a cross, raised in 1888, from P. Lemoinei and the double-flowered form of P. coronarius. The flowers are double white and with the pleasant, but not heavy, scent of P. microphyllus. P. Lemoinei Gerbe de Neige bears pleasantly-scented flowers that are as large as those of the well-known P. speciosissimus. There is an erect form of P. Lemoinei named erectus that is also worthy of note.

P. LEWISI, from North America, is hardly sufficiently distinct from some of the others to warrant special notice.

P. MICROPHYLLUS, from New Mexico (1883), is of low growth, and remarkable for its slender branches, small, Myrtle-like leaves, and abundance of small, white flowers. It is a decidedly pretty shrub, but is not so hardy as the others.

P. SATZUMI (syn P. chinensis).—Japan, 1851. A slender-growing species, with long and narrow leaves, and large, white flowers.

P. TRIFLORUS and P. MEXICANUS are other species that might be worthy of including in a representative collection of these plants.

This is a valuable genus of shrubs, all being remarkable for the abundance of white, and usually sweet-scented, flowers which they produce. They require no special treatment, few soils, if at all free and rich, coming amiss to them; while even as shrubs for shady situations they are not to be despised. Propagation is effected by means of cuttings, which root freely if placed in sandy soil.

PHILLYREA.

P. ANGUSTIFOLIA (narrow-leaved Phillyrea), P. ilicifolia (Holly-leaved Phillyrea), P. salicifolia (Willow-leaved Phillyrea), P. buxifolia (Box-leaved Phillyrea), and P. ligustrifolia (Privet-leaved Phillyrea), are all more or less valuable species, and their names indicate their peculiarities of leafage. P. angustifolia rosmarinifolia (syn P. neapolitana) is a somewhat rare shrub, but one that is well worthy of culture, if only for its neat habit and tiny little Rosemary-like leaves. It is from Italy, and known under the synonym of P. rosmarinifolia.

P. LATIFOLIA (syn P. obliqua).—Broad-leaved Phillyrea. South Europe, 1597. This is a compact-growing and exceedingly ornamental shrub, with bright and shining, ovate-serrulated leaves. For its handsome, evergreen foliage and compact habit of growth it is, perhaps, most to be valued, for the small flowers are at their best both dull and inconspicuous. Not very hardy unless in the sea-coast garden.

P. MEDIA (syns P. ligustrifolia and P. oleaefolia).—South Europe, 1597. This is another interesting species, but not at all common in cultivation.

P. VILMORINIANA (syns P. laurifolia and P. decora).—Asia Minor, 1885, This is a grand addition to these valuable shrubs, of which it is decidedly the best from an ornamental point of view. It is of compact growth, with large, Laurel-like leaves, which are of a pleasing shade of green, and fully 4 inches long. They are of stout, leathery texture, and plentifully produced. That this shrub is perfectly hardy is now a well-established fact.

The Phillyreas succeed well in light, warm, but not too dry soil, and they do all the better if a warm and sheltered position is assigned to them. Being unusually bright of foliage, they are of great service in planting for shrubbery embellishment, and which they light up in a very conspicuous manner during the dull winter months. They get shabby and meagre foliaged if exposed to cold winds.

PHLOMIS.

PHLOMIS FRUTICOSA.—Jerusalem Sage. Mediterranean region, 1596. This is a neat-growing shrubby plant, with ovate acute leaves, that are covered with a yellowish down. From the axils of the upper leaves the whorls of yellow flowers are freely produced during the summer months. It is valued for its neat growth, and as growing on dry soils where few other plants could eke out an existence.

PHOTINIA.

PHOTINIA JAPONICA (syn Eriobotrya japonica).—Loquat, Japan Medlar, or Japan Quince. Japan, 1787. This is chiefly remarkable for its handsome foliage, the leaves being oblong of shape and downy on the under sides. The white flowers are of no great beauty, but being produced at the beginning of winter, and when flowers are scarce, are all the more welcome. It requires protection in all but the warmer parts of these islands.

P. ARBUTIFOLIA (syns Crataegus arbutifolia and Mespilus arbutifolia).—Arbutus-leaved Photinia, or Californian May-bush. California, 1796. This is a very distinct shrub, with leaves resembling those of the Strawberry Tree (Arbutus), the flowers in an elongated panicle, and bright red bark on the young wood.

P. BENTHAMIANA is only worthy of culture for its neat habit and freedom of growth when suitably placed.

P. SERRULATA (syn Crataegus glabra).—Chinese Hawthorn. Japan and China, 1804. This has Laurel-like leaves, 4 inches or 5 inches long, and, especially when young, of a beautiful rosy-chocolate colour, and clustered at the branch-tips. Flowers small, white, and produced in flat corymbs. An invaluable seaside shrub.

They all grow well either in light, rich loam, or in sandy, peaty earth, and are usually propagated by grafting.

PHYLODOCE.

PHYLODOCE TAXIFOLIA (syns P. caerulea and Menziesia caerulea).—An almost extinct native species, having crowded linear leaves, and lilac-blue flowers. It is only of value for rock gardening.

PIERIS.

PIERIS FLORIBUNDA (syns Andromeda floribunda and Leucothoe floribunda).—United States, 1812. Few perfectly hardy shrubs are more beautiful than this, with its pure white Lily-of-the-Valley like flowers, borne in dense racemes and small, neat, dark green leaves. To cultivate this handsome shrub in a satisfactory way, fairly rich loam or peat, and a situation sheltered from cold and cutting winds, are necessities.

P. JAPONICA (syn Andromeda japonica).—Japan, 1882. A hardy, well-known shrub, that was first brought specially under notice in "The Garden," and of which a coloured plate and description were given. It is thickly furnished with neat and small deep-green, leathery leaves, and pretty, waxy white flowers, pendulous at the branch tips. Planted in free, sandy peat, it thrives vigorously, and soon forms a neat specimen of nearly a yard in height. It is a very desirable hardy species, and one that can be confidently recommended for ornamental planting. There is a variegated variety, P. japonica elegantissima, with leaves clearly edged with creamy-white, and flushed with pink. Amongst variegated, small-growing shrubs it is a gem.

P. MARIANA (syn Andromeda Mariana ovalis).—North America, 1736. A neat shrub of about 3 feet in height, with oval leaves, and pretty white flowers in pendent clusters.

P. OVALIFOLIA (syn Andromeda ovalifolia).—Nepaul, 1825. A fine, tall-growing species, with oval-pointed, leathery leaves placed on long footstalks. Flowers in lengthened, drooping, one-sided racemes, and white or pale flesh-coloured. Being perfectly hardy, and attaining to as much as 20 feet in height, it is a desirable species for the lawn or shrubbery.

PIPTANTHUS.

PIPTANTHUS NEPALENSIS (syn Baptisia nepalensis).—Evergreen Laburnum. Temperate Himalaya, 1821. A handsome, half-hardy shrub, of often fully 10 feet high, with trifoliolate, evergreen leaves, and terminal racemes of large yellow flowers. In the south and west of England and Ireland it does well, and only receives injury during very severe winters. Planted either as a single specimen, or in clumps of three or five, the evergreen Laburnum has a pleasing effect, whether with its bright, glossy-green leaves, or abundance of showy flowers. It is of somewhat erect growth, with stout branches and plenty of shoots. Propagated from seed, which it ripens abundantly in this country.

PITTOSPORUM.

PITTOSPORUM TOBIRA.—Japan, 1804. This forms a neat, evergreen shrub, with deep green, leathery leaves, and clusters of white, fragrant flowers, each about an inch in diameter. It is hardy in the more favoured parts of the south and west of England, where it makes a reliable seaside shrub.

P. UNDULATUM, from Australia (1789), is also hardy against a wall, but cannot be depended upon generally. It is a neat shrub, with wavy leaves, that are rendered conspicuous by the dark midribs. They grow well in any good garden soil.

PLAGIANTHUS.

PLAGIANTHUS LYALLI, a native of New Zealand (1871), and a member of the Mallow family, is a free-flowering and beautiful shrub, but one that cannot be recommended for general planting in this country. At Kew it does well and flowers freely on an east wall. The flowers are snow-white, with golden-yellow anthers, and produced on the ends of the last season's branchlets during June and July. The flower-stalks, being fully 2 inches long, give to the flowers a very graceful appearance. In this country the leaves are frequently retained till spring.

P. LAMPENI.—Van Dieman's Land, 1833. This is about equally hardy with the former, and produces a great abundance of sweetly-scented flowers.

P. PULCHELLUS (syn Sida pulchella).—Australia and Tasmania. Another half-hardy species, which bears, even in a young state, an abundance of rather small, whitish flowers.

POLYGALA.

POLYGALA CHAMAEBUXUS.—Bastard Box. A neat little shrubby plant, with small ovate, coriaceous leaves, and fragrant yellow and cream flowers. P. chamaebuxus purpureus differs in bearing rich reddish-purple flowers, and is one of the most showy and beautiful of rock plants. They are natives of Europe (1658), and grow best in vegetable mould.

POTENTILLA.

POTENTILLA FRUTICOSA.—Northern Hemisphere (Britain). An indigenous shrub that grows about a yard high, with pinnate leaves and golden flowers. It is a most persistent blooming plant, as often for four months, beginning in June, the flowers are produced freely in succession. It delights to grow in a strong soil, and, being of low, sturdy growth, does well for the outer line of the shrubbery.

PRUNUS.

PRUNUS AMYGDALUS (syn Amygdalus communis).—Common Almond. Barbary, 1548. Whether by a suburban roadside, or even in the heart of the crowded city, the Almond seems quite at home, and is at once one of the loveliest and most welcome of early spring-flowering trees. The flowers are rather small for the family, pale pink, and produced in great quantity before the leaves. There are several distinct forms of the Almond, differing mainly in the colour of the flowers, one being pink, another red, while a third has double flowers. P. Amygdalus macrocarpa (Large-fruited Almond) is by far the handsomest variety in cultivation, the flowers being large, often 3 inches in diameter, and white tinged with pink, particularly at the base of the petals. The flowers, too, are produced earlier than those of any other Almond, while the tree is of stout growth and readily suited with both soil and site.

P. AMYGDALUS DULCIS (syn A. dulcis), Sweet Almond, of which there are three distinct varieties, P.A. dulcis purpurea, P.A. dulcis macrocarpa, and P.A. dulcis pendula, should be included in every collection of these handsome flowering plants.

P. AVIUM JULIANA (syn Cerasus Juliana).—St. Julian's Cherry. South Europe. This bears large flowers of a most beautiful and delicate blush tint. P. Avium multiplex is a double form of the Wild Cherry, or Gean, with smaller leaves than the type.

P. BOISSIERII (syn Amygdalus Boissierii).—Asia Minor, 1879. This is a bushy shrub, with almost erect, long, and slender branches, and furnished with leaves an inch long, elliptic, and thick of texture. Flowers pale flesh-coloured, and produced abundantly. It is a very ornamental and distinct plant, and is sure, when better known, to attract a considerable amount of attention.

P. CERASIFERA (syn P. Myrobalana).—Cherry, or Myrobalan Plum. Native Country unknown. A medium-sized tree, with an abundance of small white flowers, which are particularly attractive if they escape the early spring frosts. It is of stout, branching habit, with a well-rounded head, and has of late years attracted a good deal of notice as a hedge plant. P. cerasifera Pissardii, the purple-leaved Cherry plum, is a remarkable and handsome variety, in which the leaves are deep purple, thus rendering the plant one of the most distinct and ornamental-foliaged of the family. It produces its white, blush-tinted flowers in May. It was received by M.A. Chatenay, of Sceau, from M. Pissard, director of the garden of His Majesty the Shah of Persia. When it flowered it was figured in the Revue Horticole, 1881, p. 190.

P. CERASUS (syn Cerasus vulgaris).—Common Cherry. A favourite medium-sized tree, and one that lends itself readily to cultivation. As an ornamental park tree this Cherry, though common, must not be despised, for during summer, when laden with its pure white flowers, or again in autumn when myriads of the black, shining fruits hang in clusters from its branches, it will be readily admitted that few trees have a more beautiful or conspicuous appearance, P. Cerasus flore-pleno (double-flowered Cherry) is a distinct and desirable variety. P. Cerasus multiplex is a very showy double form, more ornamental than P. Avium muliplex, and also known under the names of Cerasus ranunculiflora and C. Caproniana multiplex. P. Cerasus semperflorens (syn Cerasus semperflorens), the All Saints, Ever Flowering, or Weeping, Cherry, is another valuable variety, of low growth, and with gracefully drooping branches, particularly when the tree is old. It is a very desirable lawn tree, and flowers at intervals during the summer.

P. CHAMAECERASUS (syn Cerasus Chamaecerasus).—Ground Cherry. Europe, 1597. This is a dwarf, slender-branched, and gracefully pendent shrub, of free growth, undoubted hardihood, and well worthy of extended cultivation. The variety C. Chamaecerasus variegata has the leaves suffused with greenish lemon. There is also a creeping form named P. Chamaecerasus pendula.

P. DAVIDIANA.—AbbE David's Almond. China. This is the tree to which, under the name of Amygdalus Davidiana alba, a First-class Certificate was awarded in 1892 by the Royal Horticultural Society. The typical species is a native of China, from whence it was introduced several years ago, but it is still far from common. It is the earliest of the Almonds to unfold its white flowers, for in mild winters some of them expand before the end of January; but March, about the first week, it is at its best. It is of more slender growth than the common Almond, and the flowers, which are individually smaller, are borne in great profusion along the shoots of the preceding year, so that a specimen, when in full flower, is quite one mass of bloom. There is a rosy-tinted form known as Amygdalus Davidiana rubra.

P. DIVARICATA, from the Caucasus (1822), is useful on account of the pure white flowers being produced early in the year, and before the leaves. It has a graceful, easy habit of growth, and inclined to spread, and makes a neat lawn or park specimen.

P. DOMESTICA, Common Garden Plum, and P. domestica insititia, Bullace Plum, are both very ornamental-flowering species, and some of the varieties are even more desirable than the parent plants.

P. ILLICIFOLIA (syn Cerasus ilicifolius).—Holly-leaved Cherry. California. A distinct evergreen species, with thick leathery leaves, and erect racemes of small white flowers. A native of dry hilly ground along the coast from San Francisco to San Diego. Hardy in most situations, but requiring light warm soil and a dry situation.

P. LAUNESIANA (syn Cerasus Launesiana).—Japan, 1870. This is a valuable addition to the already long list of ornamental-flowering Cherries. It flowers in the early spring, when the tree is literally enshrouded in rose-coloured flowers, and which produce a very striking effect. The tree is quite hardy, flowers well even in a young state, and will grow in any soil that suits our common wild species.

P. LAUROCERASUS (syn Cerasus Laurocerasus).—Common, or Cherry Laurel. Levant, 1629. Although a well-known garden and park shrub, of which a description is unnecessary, the common or Cherry Laurel, when in full flower, must be ranked amongst our more ornamental shrubs. There are several varieties all worthy of culture for the sake of their evergreen leaves and showy flower spikes. P. Laurocerasus rotundifolia has leaves that are broader in proportion to their length than those of the common species; P. Laurocerasus caucasica is of sturdy growth, with deep green leaves, and a compact habit of growth; P. Laurocerasus colchica is the freest-flowering Laurel in cultivation, with horizontally arranged branches and pale green leaves; P. Laurocerasus latifolia, a rather tender shrub, with bold handsome foliage; and P. Laurocerasus parvifolia, of low growth, but never very satisfactory in appearance. Three other less common forms might also be mentioned. P. Laurocerasus angustifolia, with narrow leaves; P. Laurocerasus camelliaefolia, with thick leathery foliage; and P. Laurocerasus intermedia, halfway between P. Laurocerasus angustifolia and the common Laurel.

P. LUSITANICA (syn Cerasus lusitanica).—Portugal Laurel. Portugal, 1648. A well-known shrub or small growing tree, and one of the most valuable of all our hardy evergreens. It is of neat and compact growth, with a good supply of bright green shining foliage, and bears long spikes of pleasing creamy white perfumed flowers. P. lusitanica myrtifolia (Myrtle-leaved Portugal Laurel) differs from the species in the smaller, longer, and narrower leaves, which are more thickly arranged, and in its more decided upright habit. P. lusitanica variegata is hardly sufficiently constant or distinct to warrant recommendation. P. lusitanica azorica, from the Azores, is of more robust growth than the common plant, with larger and richer green leaves, and the bark of the younger branches is of a very decided reddish tinge.

P. MAHALEB (syn Cerasus Mahaleb).—The Mahaleb, or Perfumed Cherry. South Europe, 1714. This and its variegated variety P. Mahaleb variegata are very free-flowering shrubs, and of neat growth. The variegated variety is well worthy of attention, having a clear silvery variegation, chiefly confined to the leaf margin, but in a less degree to the whole of the foliage, and imparting to it a bright, glaucous tint that is highly ornamental. There is a partially weeping form named P. Mahaleb pendula.

P. MARITIMA.—Beach or Sand Plum. North America, 1800. A prostrate, spreading shrub, that is of value for planting in poor sandy soil, and along the sea coast. The flowers are small, but plentifully produced.

P. NANA (syns Amygdalus nana and A. Besseriana).—Dwarf Almond. From Tartary, 1683. This is of dwarf, twiggy growth, rarely more than 3 feet high, and bearing an abundance of rose-coloured flowers in early February. From its neat, small growth, and rich profusion of flowers, this dwarf Almond may be reckoned as a most useful and desirable shrub. Suckers are freely produced in any light free soil.

P. PADUS (syn Cerasus Padus).—Bird Cherry or Hagberry. An indigenous species, with oblong, doubly-serrated leaves, and terminal or axillary racemes of pure-white flowers. It is a handsome and distinct small-growing tree, and bears exposure at high altitudes in a commendable manner.

P. PANICULATA FLORE-PLENO (syns Cerasus serrulata flore-pleno and C. Sieboldii).—China, 1822. This is one of the most desirable of the small-growing and double-flowered Cherries. It is of neat growth, with short, stout branches that are sparsely furnished with twigs, and smooth, obovate, pointed leaves, bristly serrated on the margins. Flowers double and white at first, but afterwards tinged with pink, freely produced and of good, lasting substance. P. paniculata Watereri is a handsome variety that most probably may be linked to the species.

P. PENNSYLVANIA.—American Wild Red Cherry. North America, 1773. This is an old-fashioned garden tree, and one of the choicest, producing in May a great abundance of its tiny white flowers.

P. PERSICA FLORE-PLENO (syns Amygdalus Persica flore-pleno and Persica vulgaris), double-flowering Peach, is likewise well worthy of culture, there being white, rose, and crimson-flowering forms.

P. PUDDUM (syns P. Pseudo-cerasus and Cerasus Pseudo-cerasus).—Bastard Cherry. China, 1891. There are very few more ornamental trees in cultivation in this country than the double-flowering Cherry. It makes a charming small-growing tree, is of free growth and perfectly hardy, and one of, if not the most, floriferous of the tribe. The flowers are individually large, pinky or purplish-white, and produced with the leaves in April.

P. SINENSIS.—China, 1869. A Chinese Plum of somewhat slender growth, and with the branches wreathed in small, white flowers. It is often seen as a pot plant, but it is one of the hardiest of its family. P. sinensis flore-pleno is a double white form, and the most ornamental for pot work. There is also a variety with rose-coloured flowers.

P. SPINOSA.—Sloe, or Blackthorn. An indigenous, spiny shrub, with tiny white flowers; and P. spinosa flore-pleno has small, rosette-like flowers that are both showy and effective.

P. TOMENTOSA.—Japan, 1872. This is one of the most desirable of hardy shrubs, with large, white, flesh-tinted flowers produced in the first weeks of March, and in such quantities as almost to hide the branches from view. It forms a well-rounded, dense bush of 5 feet or 6 feet high.

P. TRILOBA (syns P. virgata, Amygdalopsis Lindleyi and Prunopsis Lindleyi).—China, 1857. This is a very handsome early-flowering shrub, that is at once recognised by the generally three-lobed leaves. It is one of the first to flower, the blossoms being produced in March and April, and sometimes even earlier when the plant is grown against a sunny, sheltered wall. The semi-double flowers are large and of good substance, and of a rosy-white tint, but deep rose in the bud state. There is a nursery form of this plant with white flowers, named P. triloba alba. It is quite hardy, bears pruning well, and grows quickly, soon covering a large space of a wall or warm, sunny bank. As an ornamental flowering lawn shrub it has few equals, the blossoms remaining good for fully a fortnight.

P. VIRGINIANA (syn Cerasus virginiana) and P. SEROTINA (North American Bird Cherries) are worthy species, with long clusters of flowers resembling those of our native Bird Cherry. They are large-growing species, and, particularly the latter, are finding favour with cultivators in this country on account of their bold and ornamental appearance.

PTELEA.

PTELEA TRIFOLIATA.—Hop Tree, or Swamp Dogwood. North America, 1704. A small-growing tree, with trifoliolate, yellowish-green leaves placed on long footstalks, and inconspicuous greenish flowers. The leaves, when bruised, emit an odour resembling Hops. P. trifoliata variegata is one of the handsomest of golden-leaved trees, and is well worthy of extensive planting. It is preferable in leaf colouring to the golden Elder. Perfectly hardy.

PUNICA.

PUNICA GRANATUM.—Pomegranate. For planting against a southern-facing wall this pretty shrub is well suited, but it is not sufficiently hardy for the colder parts of the country. Frequently in the more favoured parts of the country it reaches a height of 14 feet, with a branch-spread of nearly as much, and is then, when in full flower, an object of general admiration and of the greatest beauty. The flowers are of a rich, bright scarlet colour, and well set off by the glossy, dark green leaves. P. Granatum rubra flore-pleno is a decidedly ornamental shrub, in which the flowers are of a bright scarlet, and perfectly double. They grow satisfactorily in light, but rich soil.

PYRUS.

PYRUS ARIA.—White Beam Tree. Europe (Britain). A shrub or small-growing tree, with lobed leaves, covered thickly on the under sides with a close, flocculent down. The flowers are small and white, and produced in loose corymbs. It is a handsome small tree, especially when the leaves are ruffled by the wind and the under sides revealed to view. The red or scarlet fruit is showy and beautiful.

P. AUCUPARIA.—Mountain Ash, or Rowan Tree. Too well-known to need description, but one of our handsomest small-growing trees, and whether for the sake of its dense corymbs of small white flowers or large bunches of scarlet fruit it is always welcomed and admired. P. Aucuparia pendula has the branches inclined to be pendulous; and P. Aucuparia fructo-luteo differs from the normal plant in having yellowish instead of scarlet fruit.

P. AMERICANA (syn Sorbus americana).—American Mountain Ash. This species, a native of the mountains of Pennsylvania and Virginia (1782), is much like our Rowan Tree in general appearance, but the bunches of berries are larger, and of a brighter red colour.

P. ANGUSTIFOLIA.—North America, 1750. A double-flowered crab is offered under this name, of vigorous growth, bearing delicate pink, rose-like flowers that are deliciously fragrant, and borne contemporaneously with the leaves. The merits claimed for the shrub are perfect hardihood, great beauty of blossom and leaf, delicious fragrance, and adaptability to various soils. The single-flowered form extends over large areas in the Atlantic States of North America. They are very desirable, small-growing trees, and are described by Professor Sargent as being not surpassed in beauty by any of the small trees of North America.

P. BACCATA.—Siberian Crab. Siberia and Dahuria, 1784. This is one of the most variable species in cultivation, and from which innumerable forms have been developed, that differ either in habit, foliage, flowers, or fruit. The deciduous calyx would seem to be the only reliable distinguishing character. It is a widely-distributed species, being found in North China and Japan, Siberia and the Himalayas, and has from time immemorial been cultivated by the Chinese and Japanese, so that it is not at all surprising that numbers of forms have been developed.

P. CORONARIA.—Sweet Scented Crab. North America, 1724. This is a handsome species, with ovate, irregularly-toothed leaves, and pink and white fragrant flowers. The flowers are individually large and corymbose, and are succeeded by small green fruit.

P. DOMESTICA (syn Sorbus domestica).—True Service. Britain. This resembles the Mountain Ash somewhat, but the flowers are panicled, and the berries fewer, larger, and pear-shaped. The flowers are conspicuous enough to render the tree of value in ornamental planting.

P. FLORIBUNDA (syns P. Malus floribunda and Malus microcarpa floribunda).—China and Japan, 1818. The Japanese Crabs are wonderfully floriferous, the branches being in most instances wreathed with flowers that are individually not very large, and rarely exceeding an inch in diameter when fully expanded. Generally in the bud state the flowers are of a deep crimson, but this disappears as they become perfectly developed, and when a less striking tint of pinky-white is assumed. From the St. Petersburgh gardens many very ornamental Crabs have been sent out, these differing considerably in colour of bark, habit, and tint of flowers. They have all been referred to the above species. P. floribunda is a worthy form, and one of the most brilliant of spring-flowering trees. The long, slender shoots are thickly covered for almost their entire length with flowers that are rich crimson in the bud state, but paler when fully opened. There are numerous, very distinct varieties, such as P. floribunda atrosanguinea, with deep red flowers; P. floribunda Elise Rathe, of pendulous habit; P. floribunda John Downie, very beautiful in fruit; P. floribunda pendula, a semi-weeping variety; P. floribunda praecox, early-flowering; P. floribunda mitis, of small size; P. floribunda Halleana or Parkmanii, probably the most beautiful of all the forms; and P. floribunda Fairy Apple and P. floribunda Transcendant Crab, of interest on account of their showy fruit. P. floribunda Toringo (Toringo Crab) is a Japanese tree of small growth, with sharply cut, usually three-lobed, pubescent leaves, and small flowers. Fruit small, with deciduous calyx lobes.

P. GERMANICA (syn Mespilus germanica).—Common Medlar. Europe (Britain), Asia Minor, Persia. Early records show that the Medlar was cultivated for its fruit as early as 1596. Some varieties are still grown for that purpose, and in that state the tree is not devoid of ornament. The large, white flowers are produced singly, but have a fine effect in their setting of long, lanceolate, finely-serrate leaves during May.

P. JAPONICA (syn Cydonia japonica).—Japanese Quince. Japan, 1815. This is one of the commonest of our garden shrubs, and one that is peculiarly well suited for our climate, whether planted as a standard or as a wall plant. The flowers are brilliant crimson, and plentifully produced towards the end of winter and before the leaves. Besides the species there are several very fine varieties, including P. japonica albo cincta, P. japonica atropurpurea, P. japonica coccinea, P. japonica flore-pleno, P. japonica nivalis, a charming species, with snowy-white flowers; P. japonica rosea, of a delicate rose-pink; and P. japonica princeps. P. japonica cardinalis is one of the best of the numerous forms of this beautiful shrub. The flowers are of large size, of full rounded form, and of a deep cardinal-rose colour. They are produced in great quantity along the branches. A well-grown specimen is in April a brilliant picture of vivid colour, and the shrub is sooner or later destined to a chief place amongst our ornamental flowering shrubs. P. japonica Maulei (syn Cydonia Maulei), from Japan (1874), is a rare shrub as yet, small of growth, and with every twig festooned with the brightest of orange-scarlet flowers. It is quite hardy, and succeeds well under treatment that will suit the common species.

P. PRUNIFOLIA.—Siberia, 1758. Whether in flower or fruit this beautiful species is sure to attract attention. It is a tree of 25 feet in height, with nearly rotundate, glabrous leaves on long footstalks, and pretty pinky-white flowers. The fruit is very ornamental, being, when fully ripe, of a deep and glowing scarlet, but there are forms with yellow, and green, as also striped fruit.

P. RIVULARIS.—River-side Wild Service Tree. North-west America, 1836. A native of North America, with terminal clusters of white flowers, succeeded by sub-globose red or yellow fruit, is an attractive and handsome species. The fruit is eaten by the Indians of the North-west, and the wood, which is very hard and susceptible of a fine polish, is largely used in the making of wedges. It is a rare species in this country.

P. SINICA (syn P. sinensis of Lindley).—Chinese Pear Tree. China and Cochin China, 1820. Another very ornamental Crab, bearing a great abundance of rosy-pink or nearly white flowers. It is a shrub-like tree, reaching a height of 20 feet, and with an upright habit of growth. Bark of a rich, reddish-brown colour. It is one of the most profuse and persistent bloomers of the whole family.

P. SINENSIS (syn Cydonia chinensis).—Chinese Quince. China, 1818. This is rarely seen in cultivation, it having, comparatively speaking, few special merits of recommendation.

P. SMITHII (syns Mespilis Smithii and M. grandiflora).—Smith's Medlar. Caucasus, 1800. The habit of this tree closely resembles that of a Hawthorn, and although the flowers are only half the size of those of the Common Medlar, they are produced in greater profusion, so that the round-headed tree becomes a sheet of white blossom during May and June. The reddish-brown fruits are small for a Medlar, and ripen in October.

P. TORMINALIS.—Wild Service Tree. A native species of small growth, with ovate-cordate leaves, and small white flowers. P. torminalis pinnatifida, with acutely-lobed leaves, and oval-oblong fruit may just be mentioned.

P. VESTITA.—Nepaul White Beam. Nepaul, 1820. In this species the leaves are very large, ovate-acute or elliptic, and when young thickly coated with a white woolly-like substance, but which with warm weather gradually gives way until they are of a smooth and shining green. The flowers are borne in woolly racemose corymbs, and are white succeeded by greenish-brown berries as large as marbles.

Other species of less interest are P. varidosa, P. salicifolia, P. salvaefolia, P. Bollwylleriana, and P. Amygdaliformis. They are all of free growth, and the readiest culture, and being perfectly hardy are well worthy of a much larger share of attention than they have heretofore received.

RHAMNUS.

RHAMNUS ALATERNUS.—Mediterranean region, 1629. This is an evergreen shrub, with lanceolate shining leaves of a dark glossy-green colour, and pretty flowers produced from March till June. There are several well-marked varieties, one with golden and another with silvery leaves, and named respectively, R. Alaternus foliis aureis, and R. Alaternus foliis argenteus.

R. ALPINUS.—Europe, 1752. This is a neat-growing species, with greenish flowers and black fruit.

R. CATHARTICUS, Common Buckthorn, is a native, thorny species, with ovate and stalked leaves, and small, thickly clustered greenish flowers, succeeded by black berries about the size of peas.

R. FRANGULA.—The Berry-bearing Alder. Europe and Britain. A more erect shrub than the former, and destitute of spines. The leaves too are larger, and the fruit of a dark purple colour when ripe. More common in Britain than the former.

RHAPHIOLEPIS.

RHAPHIOLEPIS JAPONICA INTEGERRIMA (syn R. ovata).—A Japanese shrub (1865), with deep green, ovate, leathery leaves that are not over abundant, and produced generally at the branch-tips. The pure white, fragrant flowers are plentifully produced when the plant is grown in a cosy corner, or on a sunny wall. Though seldom killed outright, the Raphiolepis becomes badly crippled in severe winters. It is, however, a bold and handsome shrub, and one that may be seen doing well in many gardens around London.

RHAPHITHAMNUS.

RHAPHITHAMNUS CYANOCARPUS (syn Citharexylum cyanocarpum). Chili. This bears a great resemblance to some of the thorny Berberis, and is at once a distinct and beautiful shrub. The flowers are large and conspicuous, and of a taking bluish-lilac colour. Having stood unharmed in Ireland through the unusually severe winters of 1879-80, when many more common shrubs were killed outright, it may be relied upon as at least fairly hardy. The soil in which this rare and pretty shrub does best is a brown, fibrous peat, intermingled with sharp sand.

RHODODENDRON.

RHODODENDRON ARBORESCENS (syn Azalea arborescens), from the Carolina Mountains (1818), is a very showy, late-blooming species. The white, fragrant flowers, and noble port, together with its undoubted hardihood, should make this shrub a general favourite with cultivators.

R. CALENDULACEUM (syn Azalea calendulacea), from North America (1806), is another of the deciduous species, having oblong, hairy leaves, and large orange-coloured flowers. It is of robust growth, and in favoured situations reaches a height of 6 feet. When in full flower the slopes of the Southern Alleghany Mountains are rendered highly attractive by reason of the great flame-coloured masses of this splendid plant, and are one of the great sights of the American Continent during the month of June.

R. CALIFORNICUM.—California. A good hardy species with broadly campanulate rosy-purple flowers, spotted with yellow.

R. CAMPANULATUM (syn R. aeruginosum).—Sikkim, 1825. A small-growing species, rarely over 6 feet high, with elliptic leaves that are fawn-coloured on the under sides. The campanulate flowers are large and showy, rose or white and purple spotted, at the base of the three upper lobes. In this country it is fairly hardy, but suffers in very severe weather, unless planted in a sheltered site.

R. CAMPYLOCARPUM.—Sikkim, 1851. This has stood the winter uninjured in so many districts that it may at least be recommended for planting in favoured situations and by the seaside. It is a Sikkim species that was introduced about forty years ago, and is still rather rare. The leaves are about 4 inches long, 2 inches wide, and distinctly undulated on the margins. Flowers bell-shaped, about 2 inches in diameter, and arranged in rather straggling terminal heads. They are sulphur-yellow, without markings, a tint distinct from any other known Indian species.

R. CATAWBIENSE.—Mountains from Virginia to Georgia, 1809. A bushy, free growing species, with broadly oval leaves, and large campanulate flowers, produced in compact, rounded clusters. They vary a good deal in colour, but lilac-purple is the typical shade. This is a very valuable species, and one that has given rise to a large number of beautiful varieties.

R. CHRYSANTHUM is a Siberian species (1796) of very dwarf, compact growth, with linear-lanceolate leaves that are ferruginous on the under side, and beautiful golden-yellow flowers an inch in diameter. It is a desirable but scarce species.

R. COLLETTIANUM is an Afghanistan species, and one that may be reckoned upon as being perfectly hardy. It is of very dwarf habit, and bears an abundance of small white and faintly fragrant flowers. For planting on rockwork it is a valuable species.

R. DAHURICUM.—Dahuria, 1780. A small-growing, scraggy-looking species of about a yard high, with oval-oblong leaves that are rusty-tomentose on the under sides. The flowers, which are produced in February, are purple or violet, in twos or threes, and usually appear before the leaves. It is a sparsely-leaved species, and of greatest value on account of the flowers being produced so early in the season. One of the hardiest species in cultivation. R. dahuricum atro-virens is a beautiful and worthy variety because nearly evergreen.

R. FERRUGINEUM.—Alpine Rose. Europe, 1752. This dwarf species, rarely exceeding a yard in height, occurs in abundance on the Swiss Alps, and generally where few other plants are to be found. It is a neat little compact shrub, with oblong-lanceolate leaves that are rusty-scaly on the under sides, and has terminal clusters of rosy-red flowers.

R. FLAVUM (syn Azalea pontica).—Pontic Azalea. A native of Asia Minor (1793), is probably the commonest of the recognised species, and may frequently, in this country, be seen forming good round bushes of 6 feet in height, with hairy lanceolate leaves, and large yellow flowers, though in this latter it varies considerably, orange, and orange tinged with red, being colours often present. It is of free growth in any good light peaty or sandy soil.

R. HIRSUTUM.—Alpine Rose. South Europe, 1656. Very near R. ferrugincum, but having ciliated leaves, with glands on both sides. R. hallense and R. hirsutiforme are intermediate forms of a natural cross between R. hirsutum and R. ferrugincum. They are handsome, small-growing, brightly flowered plants, and worthy of culture.

R. INDICUM.—Indian Azalea. A native of China (1808), and perfectly hardy in the more favoured portions of southern England, where it looks healthy and happy out of doors, and blooms freely from year to year. This is the evergreen so-called Azalea that is so commonly cultivated in greenhouses, with long hirsute leaves, and large showy flowers. R. indicum amoenum (syn Azalea amoena), as a greenhouse plant is common enough, but except in the South of England and Ireland it is not sufficiently hardy to withstand severe frost. The flowers are, moreover, not very showy, at least when compared with some of the newer forms, being dull magenta, and rather lax of habit.

R. LEDIFOLIUM (syns Azalea ledifolia and A. liliiflora).—Ledum-leaved Azalea. China, 1819. A perfectly hardy species. The flowers are large and white, but somewhat flaunting. It is, however, a desirable species for massing in quantity, beside clumps of the pink and yellow flowered kinds. Though introduced nearly three-quarters of a century ago, this is by no means a common plant in our gardens.

R. MAXIMUM.—American Great Laurel. North America, 1756. This is a very hardy American species, growing in favoured localities from 10 feet to 15 feet high. Leaves oblong-lanceolate, slightly ferruginous beneath. Flowers rose and white, in dense clusters. There are several handsome varieties that vary to a wide extent in the size and colour of flowers. R. maximum album bears white flowers.

R. MOLLE (syn Azalea mollis), from Japan (1867), is a dwarf, deciduous species of neat growth, with flame-coloured flowers. It is very hardy, and a desirable acquisition to any collection of small-growing shrubs.

R. OCCIDENTALE (syn Azalea occidentalis), Western Azalea, is valuable in that the flowers are produced later than those of almost any other species. These are white, blotched with yellow at the base of the upper petals; and being produced when the leaves are almost fully developed, have a very pleasing effect, particularly as they are borne in great quantity, and show well above the foliage. This is a Californian species that has been found further west of the Rocky Mountains than any other member of Ihe family.

R. PARVIFOLIUM.—Baiacul, 1877. This is a pleasing and interesting species, with small deep-green ovate leaves, and clusters of white flowers, margined with rose. It is of dwarf and neat growth, and well suited for planting on the rock garden.

R. PONTICUM.—Pontic Rhododendron, or Rose Bay. Asia Minor, 1763. This is the commonest species in cultivation, and although originally a native of the district by the Black or Pontic Sea, is now naturalised in many parts of Europe. It is the hardiest and least exacting of the large flowered species, and is generally employed as a stock on which to graft the less hardy kinds. Flowers, in the typical species, pale purplish-violet and spotted. There is a great number of varieties, including white, pink, scarlet, and double-flowering.

R. PONTICUM AZALEOIDES (syn R. ponticum deciduum), a hybrid between R. ponticum and a hardy Azalea, is a sub-evergreen form, with a compact habit of growth, and bearing loose heads of fragrant lavender-and-white flowers. It is quite hardy at Kew.

R. RACEMOSUM.—Central China, 1880. A neat little species, of dwarf, compact growth, from the Yunnan district of China. The flowers are pale pink edged with a deeper tint, about an inch across, and borne in terminal and axillary clusters. It has stood unharmed for several years in southern England, so may be regarded as at least fairly hardy. Its neat dwarf growth, and flowering as it does when hardly a foot high, renders it a choice subject for the Alpine garden.

R. RHODORA (syn Rhodora canadensis).—North America, 1767. In general aspect this shrub resembles an Azalea, but it comes into flower long even before R. molle. Being deciduous, and producing its pretty purplish sweet-scented flowers in early spring, gives to the plant a particular value for gardening purposes, clumps of the shrub being most effective at the very time when flowers are at their scarcest. It thrives well in any peaty soil, and is quite hardy.

R. VISCOSUM (syn Azalea viscosa).—Clammy Azalea, or Swamp Honeysuckle. North America, 1734. This is one of the hardiest, most floriferous, and easily managed of the family. The white or rose and deliciously fragrant flowers are produced in great abundance, and impart when at their best quite a charm to the shrub. It delights in rather moist, peaty soil, and grows all the stronger and flowers all the more freely when surrounded by rising ground or tall trees at considerable distance away. The variety R. viscosum glaucum has leaves paler than those of the species; and R. viscosum nitidum, of dwarf, compact growth, has leaves deep green on both sides.

R. WILSONI, a cross between R. ciliatum and R. glaucum, is of remarkably neat growth, and worthy of cultivation where small-sized kinds are a desideratum.

The following Himalayan species have been found to thrive well in the warmer parts of England, and in close proximity to the sea;—R. argenteum, R. arboreum, R. Aucklandii, R. barbatum, R. ciliatum, R. campanulatum, R. cinnabarinum, R. Campbelli, R. compylocarpum, R. eximium, R. Fortunei, R. Falconeri, R. glaucum, R. Hodgsoni, R. lanatum, R. niveum, R. Roylei, R. Thompsoni, and R. Wallichii.

R. Ungernii and R. Smirnowii, from the Armenian frontier, are also worthy of culture, but they are at present rare in cultivation in this country.

Few hardy shrubs, it must be admitted, are more beautiful than these Rhododendrons, none flowering more freely or lasting longer in bloom. Their requirements are by no means hard to meet, light, peaty soil, or even good sandy loam, with a small admixture of decayed vegetable matter, suiting them well. Lime in any form must, however, be kept away both from Azaleas and Rhododendrons. They like a quiet, still place, where a fair amount of moisture is present in the air and soil.

HARDY HYBRID RHODODENDRONS.

GHENT AZALEAS, as generally known, from having been raised in Belgium, are a race of hybrids that have been produced by crossing the Asiatic R. pontica with the various American species noted above, but particularly R. calendulaceum, R. nudiflorum, and R. viscosum, and these latter with one another. These have produced hybrids of almost indescribable beauty, the flowers of which range in colour from crimson and pink, through orange and yellow, to almost white.

Within the last few years quite an interesting race of Rhododendrons has been brought out, with double or hose-in-hose flowers, and very appropriately termed the Narcissiflora group. They include fully a dozen highly ornamental kinds, with flowers of varying shades of colour.

The following list includes some of the best and most beautiful of these varieties:—

Alba marginata. Ardens. Astreans. Aurore-de-Royghen. Baron G. Pyke. BeautE Celeste. Bessie Holdaway. Belle Merveille. Bijou des Amateurs. Cardinal. Charles Bowman. Comte de Flanders. Decus hortorum. Due de Provence. Emperor Napoleon III. Eugenie. Fitz Quihou. Glorie de Belgique. Gloria Mundi. Gueldres Rose. Honneur de Flandre. Imperator. Jules Caesar. La Superbe. Louis Hellebuyck. Madame Baumann. Marie Verschaffelt. Mathilde. Meteor. Nancy Waterer. Ne Plus Ultra. Optima. Pallas. Queen Victoria. Reine des Belges. Remarquable. Roi des Belges. Roi des Feux. Sinensis rosea. Sulphurea. Triumphans. Unique. Viscocephala.

Double-flowered Rhododendrons:—

Bijou de Gendbrugge. Graf Von Meran. Heroine. Narcissiflora. Louis AimEe Van Houtte. Mina Van Houtte. OphiriE. Van Houttei.

RHODOTHAMNUS.

RHODOTHAMNUS CHAMAECISTUS (syn Rhododendron Chamaecistus).—Ground Cistus. Alps of Austria and Bavaria, 1786. A very handsome shrub, of small growth, and widely distributed in Bavaria, Switzerland, and elsewhere. Planted in peaty soil and in a rather damp, shady situation it thrives best, the oval-serrate leaves, covered with white, villous hairs, and pretty rosy flowers, giving it an almost unique appearance. It is a charming rock shrub and perfectly hardy.

RHODOTYPOS.

RHODOTYPOS KERRIOIDES.—White Kerria. Japan, 1866. A handsome deciduous shrub, and one that is readily propagated, and comparatively cheap. It is distinct and pretty when in flower, and one of the hardiest and most accommodating of shrubs. The leaves are handsome, being deeply serrated and silky on the under sides, while the pure white flowers are often about 2 inches across. It grows about 4 feet in height, and is a very distinct and desirable shrub.

RHUS.

RHUS COTINUS.—Smoke Plant, Wig Tree, or Venetian Sumach. Spain to Caucasus, 1656. On account of its singular appearance this shrub always attracts the attention of even the most unobservant in such matters. It is a spreading shrub, about 6 feet high, with rotundate, glaucous leaves, on long petioles. The flowers are small and inconspicuous, but the feathery nature of the flower clusters, occasioned by the transformation of the pedicels and hairs into fluffy awns, renders this Sumach one of the most curious and attractive of hardy shrubs. Spreading about freely, this south European shrub should be allowed plenty of room so that it may become perfectly developed.

R. GLABRA (syns R. caroliniana, R. coccinea, R. elegans, and R. sanguinea).—Smooth or Scarlet Sumach. North America, 1726. A smaller tree than the last, with leaves that are deep glossy-green above and whitish beneath. The male tree bears greenish-yellow flowers, and the female those of a reddish-scarlet, but otherwise no difference between the trees can be detected. R. glabra laciniata (Fern Sumach) is a distinct and handsome variety, with finely cut elegant leaves, and a dwarf and compact habit of growth. The leaves are very beautiful, and resemble those of the Grevillea robusta. It is a worthy variety.

R. SUCCEDANEA.—Red Lac Sumach. Japan, 1768. This is not often seen planted out, though in not a few places it succeeds perfectly well. It has elegant foliage, each leaf being 15 inches long, and divided into several pairs of leaflets.

R. TOXICODENDRON.—Poison Oak or Poison Ivy. North America, 1640. This species is of half-scandent habit, with large, trifoliolate leaves, which turn of various tints of red and crimson in the autumn. It is quite hardy, and seen to best advantage when allowed to run over large rockwork and tree stumps in partial shade. The variety R. toxicodendron radicans has ample foliage, and is suited for similar places to the last. The leaves turn bright yellow in the autumn.

R. TYPHINA.—Stag's Horn Sumach, or Vinegar Tree. A native of North America (1629), and a very common shrub in our gardens, probably on account of its spreading rapidly by suckers. It is, when well grown, a handsome and distinct shrub or small tree, with large, pinnate, hairy leaves, and shoots that are rendered very peculiar by reason of the dense hairs with which they are covered for some distance back. The dense clusters of greenish-yellow flowers are sure to attract attention, although they are by no means pretty. R. typhina viridiflora is the male-flowered form of this species, with green flowers.

R. VENENATA (syn R. vernix).—Poison Elder, Sumach, or Dogwood. North America, 1713. This is remarkable for its handsome foliage, and is the most poisonous species of the genus.

All the Sumachs grow and flower freely in any good garden soil, indeed, in that respect they are not at all particular. They throw up shoots freely, so that increasing the stock is by no means difficult.

RIBES.

RIBES ALPINUM PUMILUM AUREUM.—Golden Mountain Currant. The ordinary green form is a native of Britain, of which the plant named above is a dwarf golden-leaved variety.

R. AUREUM.—Buffalo Currant. North-west America, 1812. In this species the leaves are lobed and irregularly toothed, while the flowers are yellow, or slightly reddish-tinted. It is of rather slender and straggling growth. R. aureum praecox is an early-flowering variety; and R. aureum serotinum is valued on account of the flowers being produced much later than are those of the parent plant.

R. CEREUM (syn R. inebrians).—North America, 1827. One of the dwarfer-growing species of Flowering Currant, forming a low, dense bush of Gooseberry-like appearance, but destitute of spines. By May it is in full flower, and the blooms, borne in large clusters, have a pretty pinkish tinge. The foliage is small, neat, and of a tender green that helps to set off the pretty flowers to perfection. It is a native of North-west America, and perfectly hardy in every part of the country. Though not equal in point of floral beauty with our common flowering Currant, still the miniature habit, pretty and freely-produced pink-tinted flowers, and fresh green foliage will all help to make it an acquisition wherever planted. Like the other species of Ribes the present plant grows and flowers very freely in any soil, and almost however poor.

R. FLORIDUM (syns R. missouriense and R. pennsylvanicum).—American Wild Black Currant. North America, 1729. This should be included in all collections for its pretty autumnal foliage, which is of a bright purplish bronze.

R. GORDONIANUM (syns R. Beatonii and R. Loudonii) is a hybrid between R. aureum and R. sanguineum, and has reddish, yellow tinged flowers, and partakes generally of the characters of both species.

R. MULTIFLORUM, Eastern Europe (1822), is another desirable species, with long drooping racemes of greenish-yellow flowers, and small red berries.

R. SANGUINEUM.—Flowering Currant. North-west America, 1826. An old inhabitant of our gardens, and well deserving of all that can be said in its favour as a beautiful spring-flowering shrub. It is of North American origin, with deep red and abundantly-produced flowers. There are several distinct varieties as follows:—R. sanguineum flore-pleno (Burning Bush), with perfectly double flowers, which are produced later and last longer than those of the species; R. sanguineum album, with pale pink, or almost white flowers; R. sanguineum atro-rubens, with deeply-coloured flowers; R. sanguineum glutinosum and R. sanguineum grandiflorum, bearing compact clusters of flowers that are rosy-flesh coloured on the outside and white or pinky-white within.

R. SPECIOSUM.—Fuchsia-flowered Gooseberry. California, 1829. A Californian species, remarkable for being more or less spiny, and with flowers resembling some of the Fuchsias. They are crimson, and with long, protruding stamens. As a wall plant, where it often rises to 6 feet in height, this pretty and taking species is most often seen.

The flowering Currants are of unusually free growth, and are not at all particular about soil, often thriving well in that of a very poor description. They are increased readily from cuttings and by layers.

ROBINIA.

ROBINIA DUBIA (syns R. echiuata and R. ambigua).—A very pretty garden hybrid form, said to have for its parentage R. Pseud-Acacia and R. viscosa. It is of quite tree-like growth and habit, with unusually short spines, and Pea-green foliage. The flowers are produced pretty freely, and are of a pale rose colour, and well set off by the light-green leaves, over which they hang in neat and compact spikes.

R. HISPIDA.—Rose Acacia. North America, 1743. Amongst large-growing shrubs this is certainly one of the most distinct and handsome, and at the same time one of the hardiest and readiest of culture. Under favourable conditions it grows about 16 feet high, with large oval or oblong leaflets, and having the young branches densely clothed with bristles. The flowers, which are individually larger than those of the False Acacia, are of a beautiful rosy-pink, and produced in June and July. It is a very ornamental, small growing species, and one that is peculiarly suitable for planting where space is limited. R. hispida macrophylla (Large-leaved Rose Acacia) is rendered distinct by its generally more robust growth, and by its larger foliage and flowers. The species, however, varies a good deal in respect of the size of leaves and flowers.

R. PSEUD-ACACIA.—Common Locust, Bastard Acacia, or False Acacia. North America, 1640. A noble-growing and handsome tree, with smooth shoots, and stipules that become transformed into sharp, stiff spines. The flowers are in long racemes, pure-white or slightly tinged with pink, and with a faint pleasing odour. This species has been sub-divided into a great number of varieties, some of which are very distinct, but the majority are not sufficiently so to warrant special attention. The following include the best and most popular kinds:—R. Pseud-Acacia Decaisneana, a distinct form bearing light pinky flowers; R. Pseud-Acacia Bessoniana, with thornless branches and a dense head of refreshing Pea-green foliage; R. Pseud-Acacia angustifolia, with narrow leaves; R. Pseud-Acacia aurea, a conspicuous but not very constant golden leaved form; R. Pseud-Acacia inermis, of which there are weeping, upright, and broad-leaved forms, has narrow leaves that are glaucous beneath, and the characteristic spines of the species are wanting or rarely well developed. R. Pseud-Acacia monophylla is very distinct, the leaves being entire instead of pinnate; while R. Pseud-Acacia crispa has curiously-curled foliage. Then there is the peculiar R. Pseud-Acacia tortuosa, of ungainly habit; R. Pseud-Acacia umbraculifera, with a spreading head; R. Pseud-Acacia sophoraefolia, the leaves of which resemble those of Sophora japonica; and R. Pseud-Acacia amorphaefolia, with very large foliage when compared with the parent tree. The above may be taken as the most distinct and desirable forms of the False Acacia, but there are many others, such as R. Pseud-Acacia colutoides, R. Pseud-Acacia semperflorens, and R. Pseud-Acacia Rhederi, all more or less distinct from the typical tree.

R. VISCOSA (syn R. glutinosa).—Clammy Locust. North America, 1797. This is a small-growing tree, and readily distinguished by the clammy bark of the younger shoots. Flowers in short racemes, and of a beautiful rose-pink, but varying a good deal in depth of tint. It is a valuable species for ornamental planting, and flowers well even in a young state.

Few soils would seem to come amiss to the Acacias, but observations made in many parts of the country conclusively prove that the finest specimens are growing on light, rich loam overlying a bed of gravel. They are propagated from seed, by layers, or by grafting.

ROSA.

ROSA ALBA.—This is a supposed garden hybrid between R. canina and R. gallica (1597). It has very glaucous foliage, and large flowers, which vary according to the variety from pure white to rose.

R. REPENS (syn R. arvensis).—Field Rose. Europe (Britain). This species bears white flowers that are produced in threes or fours, rarely solitary. The whole plant is usually of weak and straggling growth, with shining leaves.

R. BRACTEATA (Macartney Rose), R. PALUSTRIS (Marsh Rose), and R. MICROPHYLLA (small-leaved Rose), belong to that section supplied with floral leaves or bracts, and shaggy fruit. They are of compact growth, with neat, shining leaves, the flowers of the first-mentioned being rose or carmine, and those of the other two pure white.

R. CANINA.—Dog Rose. Our native Roses have now been reduced to five species, of which the present is one of the number. It is a straggling shrub, 6 feet or 8 feet high, and armed with curved spines. Flowers sweet-scented, pink or white, and solitary, or in twos or threes at the branch tips.

R. CENTIFOLIA.—Hundred-leaved, or Cabbage Rose. Orient, 1596. A beautiful, sweetly-scented species, growing to 6 feet in height, and having leaves that are composed of from three to five broadly ovate, toothed leaflets. The flowers are solitary, or two or three together, drooping, and of a rosy hue, but differing in tint to a considerable extent. This species has varied very much, principally through the influences of culture and crossing, the three principal and marked variations being size, colour, and clothing of the calyx tube. There are the common Provence Roses, the miniature Provence or Pompon Roses, and the Moss Rose—all of which are merely races of R. centifolia.

R. DAMASCENA.—Damask Rose. Orient, 1573. A bushy shrub varying from 2 feet to 8 feet in height according to cultural treatment and age. The flowers are white or red, large, borne in corymbose clusters, and produced in great profusion during June and July. The varieties that have arisen under cultivation by seminal variation, hybridisation, or otherwise are exceedingly numerous. Those now grown are mostly double, and a large proportion of them are light in colour. They include the quatre saisons and the true York and Lancaster. The flowers are highly fragrant, and, like those of R. centifolia and other species, are used indiscriminately for the purpose of making rose water. The species is distinguished from R. centifolia by its larger prickles, elongated fruit, and long, reflexed sepals.

R. FEROX.—North Asia. This species bears flowers in clusters of two and three together, terminating the branches. The petals are white with a yellow base. The branches are erect, and thickly crowded with prickles of unequal size.

R. GALLICA.—The French, or Gallic Rose. Europe and Western Asia. This Rose forms a bushy shrub 2 feet to 3 feet high, and has been so long grown in British gardens that the date of its introduction has been lost in obscurity. It is doubtless the red Rose of ancient writers, but at present the flowers may be red, crimson, or white, and there are varieties of all intermediate shades. Several variegated or striped Roses belong here, including Gloria Mundi, a popular favourite often but erroneously grown under the name of York and Lancaster. They all flower in June and July, and, together with other kinds that flower about the same time, are generally known as summer or old-fashioned garden Roses.

R. HEMISPHAERICA (syn R. sulphurea).—Orient, 1629. A bushy plant growing from 4 feet to 6 feet high, and bearing large double yellow flowers.

R. INDICA.—Common China, or Monthly Rose. Introduced from China, near Canton, in 1789, but the native country is not known with certainty. The flowers of the plant when first introduced were red and generally semi-double, but the varieties now vary through all shades of blush, rose, and crimson, and the plant varies exceedingly in height, in its different forms 1 foot to 20 feet in height. The Monthly Roses form bushes generally about 2 feet high or a little over. The Noisette and Tea Roses, with several other more or less distinct types, belong here, but as most of them are well known and otherwise well cared for, it is unnecessary to dwell upon them in detail beyond the two varieties here given, and which should not be overlooked.

R. INDICA MINIMA (syn R. semperflorens minima, R. Lawrenceana, and R. minima).—Fairy, or Miniature Rose. China, 1810. A beautiful little Rose that rarely exceeds a height of 4 inches or 5 inches. The flowers are about the size of a half-crown, and somewhat after the York and Lancaster as regards colouring, though not, perhaps, so distinctly marked, and are produced in abundance. For the rock garden it is one of the most desirable, and being perfectly hardy still further adds to its value.

R. INDICA SEMPERFLORENS (syns R. bengalensis and R. diversifolia).—The Ever-flowering China Rose. China, 1789. A somewhat spreading bush, with slender branches, armed with curved prickles. Leaves composed of three or five leaflets, and tinted with purple. Flowers almost scentless, solitary, semi-double, and of a bright and showy crimson.

R. LUTEA (syn R. Eglanteria).—The Austrian Brier, or Yellow Eglantine. South Europe, 1596. This belongs to the Sweet Brier section, and is a bush of from 3 feet to 6 feet high, with shining dark-green leaves, and large, cup-shaped flowers that are yellow or sometimes tinged with reddish-brown within. The Scarlet Austrian Brier (R. lutea punicea) is a handsome variety, with the upper surface of the petals scarlet and the under surface yellow.

R. RUBIGINOSA (syn R. Eglanteria).—Eglantine, or Sweet Brier. This species has pink flowers and clammy leaves, which are glandular on the under surface, and give out a fragrant smell by which it may be recognised.

R. RUGOSA (syn R. ferox of Bot. Reg.), a Japanese species, and its variety R. rugosa alba, are beautiful shrubs that have proved themselves perfectly hardy and well suited for extensive culture in this country. They are of stiff, shrubby habit, about 4 feet high, and with branches thickly clothed with spines becoming brown with age. Leaflets oval in shape, deep green, with the upper surface rough to the touch, the under sides densely tomentose. Flowers single, fully 3 inches in diameter, the petals of good substance, and white or rose-coloured. The fruit is large, larger than that of perhaps any other rose, and of a bright red when fully ripe. In so far as beauty of fruit is concerned, this Rose has certainly no rival, and whether for the rockwork or open border it must be classed amongst the most useful and beautiful of hardy shrubs. R. rugosa is a capital hedge plant, and being a true species it is readily propagated from seed. R. rugosa Kamtschatika is a deep-red flowered form with deciduous spines.

R. SEMPERVIRENS.—Evergreen Rose. South Europe and India, 1529. A climbing species, with long, slender branches, armed with hooked prickles. Leaves evergreen, shining, and composed of from five to seven leaflets. The clustered flowers are white and sweet-scented.

R. SPINOSISSIMA (syn R. pimpinellifolia).—Burnet, or Scotch Rose. A small bush about 2 feet high, of neat growth, with small leaves, and pink or white flowers that are solitary at the branch ends.

R. VILLOSA.—Downy Rose. Europe (Britain). This species is of erect bushy growth, with the leaflets softly downy on both sides. Flowers white or pale pink, succeeded by globular fruits, that are more or less covered with fine hair or prickles.

ROSMARINUS.

ROSMARINUS OFFICINALIS.—Common Rosemary. Mediterranean region, 1848. A familiar garden shrub, of dense growth, with dusky-gray green linear leaves, and pale blue or white flowers. There is a golden and a silver leaved variety, named respectively R. officinalis foliis-aureis, and R. officinalis foliis-argenteis; as also one distinguished by having broader foliage than the species, and named R. officinalis latifolius.

RUBUS.

RUBUS ARCTICUS.—Arctic Regions of both hemispheres. An interesting species about 6 inches high, with trifoliolate leaves, and deep-red flowers. For Alpine gardening it is a valuable species of dwarf growth.

R. AUSTRALIS, from New Zealand, is a very prickly species, with the leaves reduced to their stalks and the midribs of three leaflets. Not being very hardy it is usually seen as a wall plant.

R. BIFLORUS.—Himalayas, 1818. A tall-growing species with whitish, spiny stems, and simple three-lobed leaves that are tomentose on the under sides. The flowers are thickly produced, pure white, and render the plant highly attractive, and of great beauty.

R. DELICIOSUS.—This Rocky Mountain Bramble (1870) is a very worthy species, with three or five-lobed (not pinnate) leaves, and large, pure white flowers that are each about 2 inches in diameter, and produced in profusion from the leaf-axils. For ornamental planting this may be placed in the first rank of the family to which it belongs.

R. FRUTICOSUS.—Common Bramble, or Blackberry. Of this well-known native species there are several worthy varieties, of which the double-flowered are especially worth notice, blooming as they do in the latter part of summer. R. fruticosus flore albo-pleno (Double white-flowered Bramble), and R. fruticosus flore roseo-pleno (Double red-flowered Bramble) are very pretty and showy varieties, and well worth including in any collection. There is a pretty variegated-leaved form of the common Bramble, known as R. fruticosus variegatus.

R. LACINIATUS, Cut-leaved Bramble, might also be included on account of its profusion of white flowers, and neatly divided foliage.

R. NUTKANUS.—North America, 1826. This has white flowers, but otherwise it resembles R. odoratus.

R. ODORATUS.—Purple flowering Raspberry. North America, 1700. The sweet-scented Virginian Raspberry forms a rather dense, upright growing bush, fully 4 feet high, with large broadly five-lobed and toothed leaves, that are more or less viscid, sweet-scented, and deciduous. The leaves are placed on long, hairy, viscid foot-stalks. Flowers in terminal corymbs, large and nearly circular, purplish-red in colour, and composed of five broad, round petals. The fruit, which is rarely produced in this country, is velvety and amber-coloured. It is a very ornamental species, the ample Maple-like leaves and large flowers rendering it particularly attractive in summer. The leaves, and not the flowers as is generally supposed, are sweetly scented.

R. ROSAEFOLIUS.—Rose-leaved Raspberry. Himalayas, 1811. Another half-hardy species, and only suited for planting against sunny walls. Leaves pinnate, finer than those of the Raspberry. R. r. coronarius, with semi-double white flowers, is better than the type.

R. SPECTABILIS.—The Salmon Berry. North America, 1827. Grows about 6 feet high, with ternate or tri-lobate leaves that are very thickly produced. Flowers usually bright red or purplish-coloured, and placed on long pendulous footstalks. It is of very dense growth, occasioned by the number of suckers sent up from the roots.

There are also some of the so-called American Brambles well worthy of attention, two of the best being Kittatiny and Lawton's:

The brambles are particularly valuable shrubs, as owing to their dense growth they may be used for a variety of purposes, but especially for covering unsightly objects or banks. They are all wonderfully floriferous, and succeed admirably even in very poor and stony soils. Increase is readily obtained either from root suckers or by layering.

RUSCUS.

RUSCUS ACULEATUS.—Butcher's Broom, Pettigree and Pettigrue. Europe (Britain), and North Africa. This is a native evergreen shrub, with rigid cladodes which take the place of leaves, and not very showy greenish flowers appearing about May. For the bright red berries, which are as large as small marbles, it is alone worth cultivating, while it is one of the few shrubs that grow at all satisfactorily beneath the shade of our larger trees.

R. HYPOPHYLLUM.—Double Tongue. Mediterranean region, 1640. This species has the flowers on the undersides of the leaf-like branches; and its variety R.H. Hypoglossum has them on the upper side. Both are of value for planting in the shade.

SAMBUCUS.

SAMBUCUS CALIFORNICA.—Californian Elder. A rare species as yet, but one that from its elegant growth and duration of flowers is sure, when better known, to become widely distributed.

S. GLAUCA has its herbaceous parts covered with a thick pubescence; leaves pubescent on both sides, and with yellow flowers produced in umbels.

S. NIGRA.—Common Elder. Bourtry, or Bour tree. Although one of our commonest native trees, the Elder must rank amongst the most ornamental if only for its large compound cymes of white or yellowish-white flowers, and ample bunches of shining black berries. There are, however, several varieties that should be largely cultivated, such as S. nigra foliis aureis (Golden Elder), S. nigra fructu albo (White Fruited), S. nigra laciniata (Cut-leaved Elder), S. nigra argentea (Silver-leaved Elder), S. nigra rotundifolia (Round-leaved Elder), the names of which will be sufficient for the purposes of recognition.

S. RACEMOSA.—Scarlet-berried Elder. South Europe and Siberia, 1596. This is almost a counterpart of our native species, but instead of black the berries are brilliant scarlet. It is a highly ornamental species, but it is rather exacting, requiring for its perfect growth a cool and moist situation. Of this there is a cut-leaved, form, named S. racemosa serratifolia.

S. ROSAEFLORA is said to be a seedling from S. glauca, but differs in many important points from the parent. It has smooth shoots and branches, ovate-acuminate leaves that are downy beneath, and flowers rose-coloured without and white within. They are produced in short, spike-like clusters, and are almost destitute of smell. The reddish rings at the insertion of the leaves is another distinguishing feature.

For freedom of growth in almost every class of soil, and readiness with which they may be increased, the more showy kinds of Elder are well worthy of attention.

SCHIZANDRA.

SCHIZANDRA CHINENSIS.—Northern China, 1860. This is a climbing shrub, with oval, bright green leaves, and showy carmine flowers. For clothing arbors and walls it may prove of use, but it is as yet rare in cultivation.

S. COCCINEA, from North America (1806), is another uncommon species in which the leaves are oblong and petiolate, and the flowers red or scarlet. For purposes similar to the last this species may be employed.

SCHIZOPHRAGMA.

SCHIZOPHRAGMA HYDRANGEOIDES.—Climbing Hydrangea. Japan, 1879. As yet this is an uncommon shrub, and allied to the Hydrangea. It is of slender growth, the stems rooting into the support, and with pinky-white flowers. As an ornamental climber it is of no great value, and requires a favoured spot to grow it at all satisfactorily.

SHEPHERDIA.

SHEPHERDIA ARGENTEA.—Beef Suet Tree, or Rabbit Berry. North America, 1820. This shrub is rendered of particular interest on account of the intense silvery hue of the foliage. The leaves are narrow and lanceolate, silvery on both sides, and dotted over with rusty-brown scales beneath. The flowers, which are produced in April, are small and yellow, unisexual, or each sex on a distinct plant. Berries scarlet, about the size of red Currants, and ripe about September.

S. CANADENSIS.—North America, 1759. This is a small-growing, straggling species, fully 4 feet high, and clothed with rusty scales. The leaves are ovate or elliptic, and green above, and the flowers of an inconspicuous yellow, succeeded by orange-red berries.

SKIMMIA.

SKIMMIA FORTUNEI.—Japan, 1845. This is a neat-growing shrub, with glossy, laurel-like leaves, white or greenish-white flowers, and an abundance of scarlet berries in autumn. It succeeds best in a somewhat shady situation, and when planted in not too heavy peaty soil, but where abundance of not stagnant moisture is present.

S. JAPONICA (of Thunberg) (syn S. oblata).—Japan, 1864. A neat-growing, evergreen shrub, with rather larger and more showy leaves than the former, and spikes of pretty whitish, sweetly scented flowers. The female form of this is usually known as S. fragrans. What is usually known as S. oblata ovata, and S. oblata Veitchii, are only forms of the true S. japonica; while S. fragrantissima is the male of the same species. The beautiful, berried plant that has been exhibited under the name of S. Foremanii, and which is of very vigorous growth, and produces pyramidal spikes of sweetly scented flowers, is probably S. japonica, or a seminal variety. Another variety sent out under the name of S. macrophylla has unusually large leaves; and another named S. Rogersi produces fruit very abundantly.

S. LAUREOLA (syn Limonia Laureola), from the Himalayas, is an uncommon species, with very fragrant and pale yellow flowers.

S. RUBELLA (China, 1874) is another member of the family that has greenish-white, sweet-scented flowers, and which when better known will be largely planted.

SMILAX.

SMILAX ASPERA.—The Prickly Ivy. South Europe, 1648. A trailing-habited shrub, with prickly stems, ovate, spiny-toothed, evergreen leaves, and rather unattractive flowers. There are other hardy species from North America, including S. Bona-nox (better known as S. tamnoides), S. rotundifolia, and S. herbacea, the first being the most desirable. S. aspera mauritanica is a hardy variety, but one that is rare in cultivation, with long, wiry shoots, and well adapted for wall or trellis covering. They all require favoured situations, else the growth is short, and the plants stunted and meagre in appearance.

SOLANUM.

SOLANUM CRISPUM.—Potato-tree. A native of Chili, 1824, and not very hardy, except in the coast regions of England and Ireland. It grows stout and bushy, often in favoured places rising to the height of 12 feet, and has large clusters of purple-blue flowers that are succeeded by small, white berries. This is a decidedly ornamental shrub, that should be cultivated wherever a suitable place can be spared. It bears hard pruning back with impunity, and succeeds in any light, rich, loamy soil.

S. DULCAMARA.—Bitter Sweet, and Woody Nightshade. This is a native plant, and one of great beauty when seen clambering over a fence, or bank. It has long, flexuous stems, and large clusters of purple flowers, which are made all the more conspicuous by the showy yellow anthers. The scarlet fruit is very effective.

SOPHORA.

SOPHORA JAPONICA (syn Styphnolobium japonicum).—Chinese or Japanese Pagoda-tree. China and Japan, 1763. A large deciduous tree, with elegant pinnate foliage, and clusters of greenish-white flowers produced in September. Leaves dark-green, and composed of about eleven leaflets. S. japonica pendula is one of the most constant of weeping trees, and valuable for planting in certain well-chosen spots on the lawn or in the park.

S. TETRAPTERA.—New Zealand, 1772. This requires protection in this country. It is a valuable species, having numerous leaflets, and bearing racemes of very showy yellow flowers. S. tetraptera microphylla is a smaller-leaved variety, with ten to forty pairs of leaflets, and is known in gardens under the names of Edwardsia Macnabiana, and E. tatraptera microphylla.

SPARTIUM.

SPARTIUM JUNCEUM (syn S. acutifolium).—Spanish, or Rush Broom. Mediterranean region and Canary Isles, 1548. This resembles our common Broom, but the slender Rush-like branches are not angular, and usually destitute of leaves. The fragrant yellow flowers are produced abundantly in racemes, and when at their best impart to the shrub a very striking and beautiful appearance. For planting in poor, sandy or gravelly soils, or amongst stones and shingle, and where only a very limited number of shrubs could be got to grow, the Spanish Broom will be found an excellent and valuable plant. It is a native of Southern Europe, and is quite hardy all over the country. Propagated from seed.

SPIRAEA.

SPIRAEA BELLA.—Pretty-flowered Spiraea. Himalayas, 1820. The reddish stems of this rather tall-growing species are of interest, and render the plant distinct. Leaves ovate, acute, and serrated, and tomentose beneath. Flowers in spreading corymbs of a very beautiful rose colour, and at their best from the middle of May till the middle of June. S. bella alba has white flowers.

S. BLUMEI.—Blume's Spiraea. Japan. This is a Japanese species, growing 4 feet or 5 feet high, with small, ovate, bluntly-pointed leaves, and white flowers arranged in compact terminal cymes. It is a good and worthy species for ornamental planting.

S. BULLATA (syn S. crispifolia.)—Japan. This will ever be accounted valuable for the rock garden, owing to its very dwarf habit and extreme floriferousness. It bears tiny bunches of bright rose-coloured flowers, and these look all the more charming owing to the miniature size of the shrub, its average height being about 12 inches. A very interesting and valuable rock shrub, and one that no doubt about its perfect hardihood need be entertained.

S. CANA.—Hoary-leaved Spiraea. Croatia, 1825. This is a small spreading shrub that rarely rises to more than 18 inches in height, with small, ovate, hoary leaves, and pretty white flowers arranged in corymbs. For rockwork planting it is one of the most valuable species, growing freely and producing its showy flowers in abundance. Quite hardy.

S. CANTONIENSIS (syn S. Reevesiana).—Reeve's Spiraea. Japan, 1843. An evergreen or sub-evergreen species, growing 3 feet high, with lanceolate leaves on long footstalks, and large, pure white flowers arranged in terminal corymbs, and placed on long peduncles.

S. CHAMAEDRIFOLIA (syn S. ceanothifolia).—Germander-leaved Spiraea. South-eastern Europe to Japan, 1789. Grows about a yard high, with ovate, pubescent leaves, and white flowers. It varies widely in the shape and size of leaves. S. chamaedrifolia ulmifolia (Elm-leaved Spiraea) a twiggy shrub, 3 feet high, with broad leaves and white flowers, is from Siberia. S. chamaedrifolia crataegifolia (Hawthorn-leaved Spiraea) is of stout, half-erect growth, with rather stiff glaucous leaves that are oval in shape, and bright red or pink flowers in fastigiate panicles. From Siberia 1790, and flowering at mid-summer.

S. DECUMBENS (syn S. nana).—Decumbent Spiraea. Tyrol. This is the smallest-growing of the shrubby Spiraeas, rarely attaining to a greater height than 12 inches. It is a neat growing plant, with small oval leaves, and white pedunculate flowers. For planting on the rockwork or in the front line of the shrubbery, this is an invaluable shrub, and soon forms a neat and pretty specimen. It is perfectly hardy.

S. DISCOLOR ARIAEFOLIA (syn S. ariaefolia).—White Beam-leaved Spiraea. North-west America, 1827. This forms a dense, erect shrub about 6 feet high, with elliptic-oblong leaves, and clothed beneath with a whitish tomentum. The flowers are in large, terminal, slender-stalked panicles, and white or yellowish-white. It is one of the handsomest species in cultivation, the neat and yet not stiff habit, and pretty, plume-like tufts of flowers making it a general favourite with the cultivators of hardy shrubs. Flowers about mid-summer. In rich soils, and where partially shaded from cold winds, it thrives best.

S. DOUGLASII.—Douglas's Spiraea. North-west America. This has long, obovate-lanceolate leaves, that are white with down on the under surface, and bears dense, oblong, terminal panicles of rosy flowers. S. Douglasii Nobleana (Noble's Spiraea) is a variety of great beauty, growing about a yard high, with large leaves often 4 inches long, and looser panicles of purple-red flowers. Flowering in July. The variety was introduced from California in 1859.