Cordyline.—A stove evergreen shrub, which may be grown in any light, vegetable mould or in peat and loam, and is easily increased by suckers. It flowers in spring. Height, 3 ft.
Coreopsis.—Very pretty and long-flowering. They all like a light, rich, and sandy soil. Cuttings of the stove kinds root freely under glass. Hardy perennials may be divided at the roots. The annuals may be sown either in the autumn or in March; they bear transplanting. Longipes flowers in April; Grandiflora in August. Useful as cut flowers. Height, 1-1/2 ft. to 3 ft.
Cornel.—See "Cornus."
Cornflower.—See "Cyanus."
Corn Salad (Lamb's Lettuce).—Sow in drills—the plants to stand 6 in. apart—from March till August, in well-drained sandy loam. Autumn sowings will stand the winter and prove useful in early spring. It must be gathered young.
Cornus Canadensis (Canadian Cornel).—A pretty herbaceous plant, suitable for moist parts of rock-work. It is very hardy, likes a light soil, and produces flowers from June to August. The roots may be divided in autumn, or in the early part of spring. Height, 8 in.
Cornus Mas (Cornelian Cherry).—This hardy deciduous shrub does well in common soil if a fair amount of moisture be given. Its yellow flowers are produced on bare stems from February to April. It may be increased by seeds, cuttings, or layers, autumn being the time to propagate.
Coronilla.—The greenhouse shrubs should be grown in peat and loam. They are raised by seeds and by cuttings. Most of the hardy perennials need protection in winter, therefore they are best grown in pots. These are propagated by seed or division. The annuals need no special treatment.
Coronilla Iberica.—A pretty creeping hardy perennial suitable for rock-work, on which its bright yellow flowers are very attractive during June and July. It thrives best in a mixture of peat and loam, and may be increased by seeds or division of the roots. Height, 6 in.
Correa Cardinalis.—An evergreen greenhouse shrub. Place in equal parts of sand and loam, and propagate by cuttings, which should have plenty of room, as they are liable to damp off. July is its flowering season. Height, 4 ft. C. Magnifica is also a capital plant.