CLEMATIS ALPINA (syn Atragene alpina, A. austriaca and A. siberica).—Europe and North America. This is a climbing species with bi-ternately divided leaves, and large flowers with four blue sepals and ten to twelve small flattened organs, which are usually termed petals.
C. CIRRHOSA.—Evergreen Virgin's Bower. Spain, 1596. An interesting, early-flowering species. The flowers, which are greenish-white, are produced in bunches and very effective. It is an evergreen species, of comparative hardihood, and flowers well in sheltered situations.
C. FLAMMULA.—Virgin's Bower. France, 1596. This old and well-known plant is quite hardy in this country. The leaves are pinnate, and the flowers white and fragrant. C. Flammula rubro-marginata is a worthy and beautiful-leaved variety.
C. FLORIDA.—Japan, 1776. This is a beautiful species, and an old inhabitant of English gardens. Leaves composed of usually three oval-shaped leaflets, and unusually bright of tint. The flowers are very large, and pure white. It should be planted in a warm sheltered corner against a wall.
C. GRAVEOLENS.—This is a dwarf shrub, with neatly tripinnate leaves, and solitary, strongly-scented yellow flowers of medium size. A native of Chinese Tartary, and quite hardy.
C. LANUGINOSA.—China, 1851. A handsome species, with large purple leaves that are hairy on the under sides. Flowers pale blue or lilac, very large, and composed of six or eight spreading sepals. C. lanuginosa pallida has immense flowers, often fully half a foot in diameter. Flowers in June.
C. MONTANA.—Nepaul, 1831. This is valuable on account of its flowering in May. It is a free-growing species, with trifoliolate leaves on long footstalks, and large white flowers. C. montana grandiflora is a beautiful variety, having large white flowers so abundantly produced as to hide the foliage. It is quite hardy and of rampant growth.
C. PATENS (syns C. caerulea and C. azurea grandiflora).—Japan, 1836. This has large, pale-violet flowers, and is the parent of many single and double flowered forms. The typical form is, however, very deserving of cultivation, on account of the freedom with which it blooms during June and July from the wood of the previous year. It is perfectly hardy even in the far north.
C. VIORNA.—Leather Flower. United States. This is a showy, small-flowered species, the flowers being campanulate, greenish-white within and purplish without. C. Viorna coccinea is not yet well known, but is one of the prettiest of the small-flowered section. The flowers, which are leathery as in the species, are of a beautiful vermilion on the outside and yellow within.
C. VITALBA.—Lady's Bower, or Old Man's Beard. A handsome native climbing shrub, common in limestone or chalky districts, and unusually abundant in the southern English counties. Clambering over some neglected fence, often to nearly 20 feet in height, this vigorous-growing plant is seen to best advantage, the three or five-lobed leaves and festoons of greenish-white, fragrant flowers, succeeded by the curious and attractive feathery carpels, render the plant one of the most distinct and desirable of our native wildlings flowering in August.
C. VITICELLA.—Spain, 1569. This is a well-known species of not too rampant growth, and a native of Spain and Italy. The flowers vary a good deal in colour, but in the typical plant they are reddish-purple and produced throughout the summer. Crossed with C. lanuginosa, this species has produced many ornamental and beautiful hybrids, one of the finest and most popular being C. Jackmanii.
C. WILLIAMSI (syn C. Fortunei).—Japan, 1863. The fragrant, white flowers of this species are semi-double, and consist of about 100 oblong-lanceolate sepals narrowed to the base. The leathery leaves are trifoliolate with heart-shaped leaflets. It proves quite hardy, and has several varieties.
GARDEN VARIETIES.—As well as the above there are many beautiful garden hybrids, some of which in point of floral colouring far outvie the parent forms. Included in the following list are a few of the most beautiful kinds:—
Alba Victor. Alexandra. Beauty of Worcester. Belle of Woking. Blue Gem. Duchess of Edinburgh. Edith Jackman. Fairy Queen. John Gould Veitch. Lady Bovill. Lord Beaconsfield. Lucie Lemoine. Madame Baron Veillard. Miss Bateman. Mrs. A. Jackman. Othello. Prince of Wales. Rubella. Star of India. Stella. Venus Victrix. William Kennett.
CLERODENDRON.
CLERODENDRON TRICHOTOMUM.—Japan, 1800. This is at once one of the most beautiful and distinct of hardy shrubs. It is of stout, nearly erect growth, 8 feet high, and nearly as much through, with large, dark-green, ovate leaves, and deliciously fragrant white flowers, with a purplish calyx, and which are at their best in September. Thriving well in any light soil, being of vigorous constitution, and extremely handsome of flower, are qualities which combine to render this shrub one of particular importance in our gardens.
C. FOETIDUM, a native of China, is only hardy in southern and seaside situations, where it forms a bush 5 feet high, with heart-shaped leaves, and large clusters of rosy-pink flowers.
CLETHRA.
CLETHRA ACUMINATA.—Pointed-leaved Pepper Tree. Carolina, 1806. This is not so hardy as C. alnifolia, hailing from the Southern States of North America, but with a little protection is able to do battle with our average English winter. It resembles C. alnifolia, except in the leaves, which are sharp pointed, and like that species delights to grow in damp positions. The flowers are white and drooping, and the growth more robust than is that of C. alnifolia generally. For planting by the pond or lake-side, the Pepper Trees are almost invaluable.
C. ALNIFOLIA.—Alder-leaved Pepper Tree. North America, 1831. A rather stiff-growing shrub of about 5 feet in height, with leaves resembling those of our common Alder, and bearing towards the end of July spikes of almost oppressively fragrant dull-white flowers at the tips of the branches. It is a valuable shrub, not only in an ornamental way, but on account of it thriving in damp, swampy ground, where few others could exist, while at the same time it will succeed and flower freely in almost any good garden soil.
COCCULUS.
COCCULUS CAROLINUS.—This is a half hardy, twining shrub, of free growth when planted by a tree stem in a sheltered wood, but with by no means showy flowers; indeed, it may be described in few words as a shrub of no great beauty nor value.
C. LAURIFOLIUS, from the Himalayas and Japan, is even less hardy than the above, although, used as a wall plant, it has survived for many years in the south and west of England. The foliage of this species is neat and ornamental, but liable to injury from cold easterly winds.
COLLETIA.
COLLETIA CRUCIATA (syn C. bictonensis).—Chili, 1824. With flattened woody branches, and sharp-pointed spines which take the place of leaves, this is at once one of the most singular of hardy flowering shrubs. It forms a stout dense bush about 4 feet high, and bears quantities of small white flowers, which render the plant one of great beauty during the summer months.
C. SPINOSA.—Peru, 1823. This species grows fairly well in some parts of England and Ireland, and is a curious shrub with awl-shaped leaves, and, like the other members of the family, an abundant producer of flowers. It thrives best as a wall plant, and when favourably situated a height of 12 feet is sometimes attained.
COLUTEA.
COLUTEA ARBORESCENS.—Bladder Senna. France, 1548. This is a common plant in English gardens, bearing yellow Pea-shaped flowers, that are succeeded by curious reddish bladder-like seed pods. It grows to 10 feet or 12 feet in height, and is usually of lax and slender growth, but perfectly hardy.
C. CRUENTA (syn C. orientalis and C. sanguine).—Oriental Bladder Senna. Levant, 1710. This is a free-growing, round-headed, deciduous bush, of from 6 feet to 8 feet high when fully grown. The leaves are pinnate and glaucous, smooth, and bright green above, and downy beneath. Flowers individually large, of a reddish-copper colour, with a yellow spot at the base of the upper petal. The fruit is an inflated boat-shaped reddish pod. The Bladder Sennas