460 STRUCTURE AND LIFE HISTORIES 



Eastern North America. The yellow water-crowfoot 

 {Ranunculus delphinifolius) is one of the commoner of the 

 40 to 50 North American species. It is found at the bor- 



FiG. 343. — Lizard's-tail {Saururus cernmis). Inflorescence, about 

 natural size. 



ders of quiet water, and the submerged leaves are iiliformly 

 dissected, in marked contrast to those borne in the air. 



