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 (Saururtis cernuus). Inflorescence, about 
natural size. 
ders of quiet water, and the submerged leaves are filif ormly 
dissected, in marked contrast to those borne in the air. 
