2 PLANT PROPAGATION 



by any asexual methods ; first, because the abundance of 

 seed obviates the need of doing so, and, second, because 

 few of them can be so propagated without difficulty. 



Many warm climate plants used for ornamental bed- 

 ding in gardens (coleus, geranium, achyranthes), though 

 perennials in their native countries, are made to. live as 

 "stock plants" (145) from year to year in greenhouses 

 though out of doors they are treated as annuals. They 

 are, therefore, so propagated. 



Perennials may or may not propagate by seeds. They 

 may, therefore, be propagated by one or the other or both 

 these methods according to convenience, economy or 

 some other consideration. When they do not propagate 



FIG. 1 MAKING CUTTINGS IN BIG COMMERCIAL GREENHOUSE 

 The man on the left is doing the "rough work"; the man on the right is "finishing." 



by seeds, they do so by buds, of which they generally 

 produce an abundance, either upon the branches and 

 sometimes the leaves, or on roots or other underground 

 parts. Thus, while the parent perennial plant may die, 

 man (and sometimes the plant itself) may take advan- 

 tage of either its seeds or its buds in perpetuation. 



