Propagated by seeds, divisions and root-cuttings. =Cypella.= _Irideæ._ Propagated by seed, sown as soon as ripe in a cool house, and by offsets. =Cyperus.= _Cyperaceæ._ Propagated either by seed, sown in gentle heat, or by divisions. =Cyphia.= _Campanulaceæ._ When the stems begin to push out from the root, cut off as many of the shoots as are required, and place them in small pots in an equal mixture of loam, peat, and sand in abundance. The young plants should be kept dry until callused, but not covered with glass. They may also be increased by cuttings, under a hand-glass in a cool house. =Cyphomandra= (Tree Tomato of Jamaica). _Solanaceæ._ Use seeds; or cuttings may be placed under glass, in bottom heat. =Cypress.= See Cupressus. =Cypripedium= (Lady's Slipper). _Orchideæ._ By seeds sometimes. Usually by division. (See under Orchids.) =Cyrilla.= _Ericaceæ._ Propagated by seeds and cuttings. =Cyrtanthus.= _Amaryllideæ._ Propagated by offsets. =Cytisus= (Scotch Broom). _Leguminosæ._ By seeds and layers. In spring, cuttings of young wood may be taken when about three inches long (with a heel preferred), placed under a bell-glass in heat, or in a close frame, where they will root readily. If gradually hardened, potted and grown on, small flowering specimens may by obtained the following spring. _C. purpurea_ is usually grafted on the common laburnum. =Dacrydium= (Tear Tree). _Coniferæ._ Increased by fresh seed and ripened cuttings. =Daffodil.= See Narcissus. =Dahlia.= _Compositæ._ Single varieties, and sometimes the doubles, are grown from seeds. The roots may be broken apart after the crowns have started in spring, and each part grown separately. The roots may be started into growth in heat late in winter, and the young sprouts may be removed and handled as ordinary cuttings as fast as they form. Or rare sorts may be increased during summer by cuttings from the growing tips. Cions made of the growing tips may be grafted into the roots by a cleft or side graft. This method is oftenest employed for the purpose of preserving over winter rare sorts which it is feared may be lost. The grafts are kept growing slowly during winter, and cuttings may be taken from them. Cuttings should always have a bud or buds at the base, and in propagation by division there must be a piece of the crown attached to the root. =Daisy.= See Bellis. =Dalbergia.= _Leguminosæ._ Place cuttings of firm young shoots in sand under a glass, in spring. Give a little bottom heat. =Dampiera.= _Goodenovieæ._ Divisions. Cuttings should be planted in a mixture of turfy loam, peat and sand, in heat. =Dandelion= (_Taraxacum officinale_). _Compositæ._ Seeds, in early spring. =Daphne.= _Thymelæaceæ._