74 



RANUNCULACEAE 



prominent ridges. The numerous seeds are flat, triangular, and 

 ]/4 to y^ inch long. 



Distribution. — The Woolly Pipe Vine grows near streams 

 and the backwaters of rivers from North Carolina and Florida 

 westward into Kansas and Alabama. In Illinois, it is limited 



FIG. 13 



Aristolochia tomentosa 



to the southern part of the state, where it occurs in its usual 

 habitat, following the Wabash River northward as far as 

 Wabash and White counties and coming up the Mississippi 

 into Jackson county. 



Another species, A. durior Hill, the Dutchman's Pipe, widely 

 used as a decorative vine, ranges from Pennsylvania to Minne- 

 sota and from Georgia to Tennessee and Kansas. It has been 

 reported in the Wabash valley in southeastern Illinois, but no 

 specimens have been seen to substantiate the report. 



RANUNCULACEAE 



The Crowfoot Family 



The crowfoot family consists of herbs or climbing vines, 

 which bear alternate or opposite, simple or compound leaves 



