THE NURSERY-LIST 289 



Corn-Salad (Valcrianella olitoria). Valerianaceoe. 



Grown from seeds sown in spring, late summer or autumn. The 

 plants mature quickly in cool weather. 



Cornus (Dogwood. Osier). Cornacece. 



Propagated by seed, suckers, layers and cuttings. Seeds usually 

 germinate the second year, being stratified the first winter. The 

 herbaceous species, C. canadensis and C. suecica, may be increased 

 by division, as also by seeds. The willow-like soft-wooded cor- 

 nuses grow from cuttings of ripe wood, C. stolonifera and its kin 

 by layers or stolons. They are often raised from firm-wood cut- 

 tings in summer in frames. Named varieties and some species are 

 budded in many cases, especially all the weak-growing sorts. If 

 possible, the stock should be the same species as the horticultural 

 variety when graftage is employed. Cornus mas, raised from 

 seed, is, however, a favorite stock. Shield-budding in late summer 

 and veneer-grafting are most successful. Fig. 99. 



Coronilla. Leguminosoe. 



Mostly grown from seeds and by division. Cuttings of young 

 wood are sometimes employed, handled in a frame or a greenhouse. 



Cortaderia (Pampas-Grass). Graminece. 



Propagated by seeds, started under glass in the North ; also 

 increased by dividing the clumps. The pampas-grass was formerly 

 included in the genus Gynerium. 



Corydalis. Fumariacece. 



Grown from seeds and by division ; the bulbous-rooted species 

 by offsets. 



Corylopsis. Hamamelidaceoe. 



Propagated by seeds sown in spring, with slight bottom heat, 

 and by cuttings of half-ripened wood in summer under glass ; 

 also by layers which root readily in moderately moist peaty soil. 



Corylus (Hazel. Filbert. Cobnut). Betulacece. 



Propagated by seeds, suckers, layers and cuttings. Grafting 

 and budding are each practicable, and are adopted when growing 

 tall standards or scarce varieties. The seed should be sown as 

 soon as gathered, or stored in sand (stratified) till the following 

 spring. All superior varieties should be increased by suckers or 

 layers. Stools kept for layering must be allowed to make more 



