PLATE II. 



B 



s? 

 <? 



'^ 



^ 





^ <ii 



O'^o .55* 



Variation in the first "nepionic" leaf of Stum cicutaefolium. Eight-ninths 

 natural size. All drawn from nature with an Abbe camera. A, B, C, etc., cor- 

 respond to (a), (<J), {c), etc., in the text. 



