Convallaria (Lily of the Valley). Liliaceæ.
Increased by “crowns” or “pips” (see [Fig. 17]), which are the separated growing points of the roots, possessing a strong bud. These crowns can be obtained from any well established bed in the fall, but they are usually imported.
Convolvulus (Bindweed). Convolvulaceæ.
Seeds of the hardy annuals should be sown in spring in the open border. The hardy perennials may be increased by seeds sown in spring, by division of the roots, and by young cuttings.
Coprosma. Rubiaceæ.
Increased by layers and cuttings.
Coptis. Ranunculaceæ.
Propagated by seeds and division of the roots.
Cordia, Varronia. Boragineæ.