290 THE NURSERY-MANUAL 



growth than those used for suckers. Free growth must be en- 

 couraged for a year or more, and, any suitable time in winter, the 

 shoots should be bent to the ground, pegged firmly and covered 

 to the depth of 3 inches with earth. They will be well rooted by 

 the following autumn, and may then be removed and planted out 

 permanently. 



Corypha. Palmacece. 

 Propagated by seeds. See Palms, page 377. 



Cosmidium : Thelesperma. 



Cosmos. Composite. 



Readily grown from seeds. In short-season climates the seeds 

 would better be started indoors. 



Costus. Zingiberaceos. 



Propagated by cutting the canes or stalks into pieces an inch or 

 so in length, and planting in sifted peat or fine moss and sand, 

 covering lightly. Also increased by dividing the roots and by 

 seeds. 



Cotinus (Smoke-Tree). Anacardiacece. 



Propagated by seeds, root-cuttings and layers. By many 

 botanists retained in the genus Rhus, as R. Cotinus. 



Cotoneaster. Rosaceas. 



Grown from fall-sown or stratified seeds ; also by autumn 

 layers, by cuttings of half-ripened wood under glass in late summer. 

 Some kinds may be grafted on seedling stocks of C. integerrima 

 (C. vulgaris), common quince, hawthorn or mountain ash. 



Cotton (Gossypium). Malvacece. 



Cotton is grown from seeds dropped where the plants are to 

 stand. In the southern states the planting runs from April 15 

 to May 15. The plants are thinned as they stand to 12 to 21 

 inches ; the rows are 3^- to 4 feet apart. About one bushel of seed 

 is sufficient to the acre, although two to three times this quantity 

 is sometimes used. 



As a greenhouse subject, cotton is sometimes raised from soft 

 cuttings. 



Cotyledon (Navelwort). Crassulacece. 



Propagated by seed, offsets, cuttings of the stem and of leaves. 

 The greenhouse kinds (as C. gibbiflora) are grown from stem 



