PKOPAGATION UV r.rUS — LAVEKAGK 



83 



of the grciwing season of the indi\'idual species. Each 

 season they push forward and also develop flowering 

 stems and leaves (Alay apple, achillea, Solomon's seal, 

 Johnson grass, Bermuda grass, etc.). Lily-of-the-valle}'^ 

 is one of the connnercially most important crown-bearing 

 plants. Its ''pips" are annually imported from Europe 

 by the million to supply the demands of florists. Until 

 needed for forcing, the pips are generally cold stored. 



FIG. 73— IRISH POTATOES SPROUTING 



At left, tuber sprouting in cellar; middle, one .'sprouted in full sunlight; right, 

 tuber planted in soil. 



126. Rosette, a cluster of leaves or other organs ar- 

 ranged somewhat like the petals of a douljle rose ; for 

 instance, the radical leaves of dandelion and carrot, the 

 stolons of houseleek. 



127. Rough division is often practiced when herbaceous 

 perennials grow too thick (phlox, rhubarb, peonv, iris) 

 1 v digging up and cutting the clumps in pieces with a 

 rharp spade. The best pieces are re-planted. ]\Ianv 

 shrubs (snowball, lilac, barberry) are so treated. This, 



