170 



THE NURSERY-BOOK. 



temperature of from 70 to 80, and keep rather dry until 

 the plants appear, when more moisture should be applied. 

 Also increased by offsets, which should be removed when 

 rather small and potted separately, and grown as recom- 

 mended for seedlings. 



Crithmum. Umbelliferce. 



Propagated by seeds sown as soon as ripe, and by divisions. 

 Crocosmia. Iridece. 



Propagated by seeds sown in pans in a cold house as soon 

 as possible after maturity. Also by offsets. 



Crocus. Iridece. 



Propagated by seed, sown as soon as ripe or early in spring, 

 the choicer strains in pots or boxes, using a light, sandy soil, 

 and afterwards placing them in a cold pit or frame; the 

 more common varieties may be placed in a warm position 

 outside in a seed bed. Sow thinly, so that the plants may 

 grow two years in the seed pan or bed without lifting. By 

 the corms. These may be lifted and replanted, allowing each 

 in its turn to develop new corms below. The following year 

 new corms, or cormels, are also formed by the side of the 

 old corms. These old corms die away annually. Some spe- 

 cies increase much more rapidly than others. 



Crossandra, Harrachia. Acanthacece. 



Seeds. Propagated by cuttings, which root freely at al- 

 most any time of the year, in bottom heat. 



Crotalaria (Rattle-Box). Leguminosce. 



Increased by seeds. The shrubby kinds by young cuttings, 

 which root freely in sand, under glass, in a cool house. 



Croton. See Codiaeum. 

 Crowea. Rutacece. 



Seeds. Usually by green cuttings in a frame. 



Crowfoot. See Ranunculus. 

 Crucianella (Crosswort). Rubiacece. 



Propagated by seeds, by divisions during spring or autumn, 

 and by cuttings. 



Cryptomeria (Japan Cedar). Conifer ce. 



Increased by seeds, and by cuttings of growing wood plant- 

 ed in sandy soil, under glass. 



