B. LINDLEYANA.—­China, 1844.  This has purplish-red flowers and angular twigs, but it cannot be relied upon unless in very sheltered and mild parts of the country.

B. PANICULATA (syn B. crispa).—­Nepaul, 1823.  This may at once be distinguished by its curly, woolly leaves, and fragrant lilac flowers.  It is a desirable species, but suffers from our climate.

BUPLEURUM.

BUPLEURUM FRUTICOSUM.—­Hare’s Ear.  South Europe, 1596.  A small-growing, branching shrub, with obovate-lanceolate leaves, and compound umbels of yellowish flowers.  It is more curious than beautiful.

CAESALPINIA.

CAESALPINIA SEPIARIA (syn C. japonica).—­India, 1857.  This is as yet a comparatively little known shrub, but one that from its beauty and hardihood is sure to become a general favourite.  Planted out in a light, sandy, peaty soil, and where fully exposed, this shrub has done well, and proved itself a suitable subject for the climate of England at least.  The hard prickles with which both stem and branches are provided renders the shrub of rather formidable appearance, while the leaves are of a peculiarly pleasing soft-green tint.  For the flowers, too, it is well worthy of attention, the pinky anthers contrasting so markedly with the deep yellow of the other portions of the flower.  They are arranged in long racemes, and show well above the foliage.

CALLUNA.

CALLUNA VULGARIS (syn Erica vulgaris).—­Common Ling on Heather.  This is the commonest native species, with purplish-pink flowers on small pedicels.  There are many very distinct and beautiful-flowering forms, the following being some of the best:  C. vulgaris alba, white-flowered; C. vulgaris Hammondi, C. vulgaris minor, and C. vulgaris pilosa, all white-flowered forms; C. vulgaris Alportii, and C. vulgaris Alportii variegata, the former bearing rich crimson flowers, and the latter with distinctly variegated foliage; C. vulgaris argentea, and C. vulgaris aurea, with silvery-variegated and golden foliage; C. vulgaris flore-pleno, a most beautiful and free-growing variety, with double flowers; C. vulgaris Foxii, a dwarf plant that does not flower freely; and C. vulgaris pumila, and C. vulgaris dumosa, which are of small cushion-like growth.

CALOPHACA.

CALOPHACA WOLGARICA.—­Siberia, 1786.  This member of the Pea family is of dwarf, branching growth, thickly clothed with glandular hairs, and bears yellow flowers, succeeded by reddish-purple pods.  It is of no special importance as an ornamental shrub, and is most frequently seen grafted on the Laburnum, though its natural easy habit of growth is far preferable.  Hailing from Siberia, it may be considered as fairly hardy at least.

CALYCANTHUS.