1^'IG. 171. — WALLFLOAVKli [I ' h c lid ill h it.< Cliiin). 



A, Bud; B, flower; and d, naked axis of modern type of double, capable 

 of propagation by iseed. c, One of the petals showing the first stage of split- 

 ting. E, Bud ; F, flower ; and g, naked axis of single for comparison. The 

 axis of the double form (d) shows the scars of the numerous petals which arise 

 by splitting of the four primitive rudiments in four groups at the four project- 

 ing angles. 



