Wolf River. Petiole long; blade often only slishtly folded, 

 and apex (A); serrations coarse and dull, often double (B). 



F/,-.'- /-// R. L. Coffu, 



Fig. 13. — Yellow Tr.\xsparext. Blade medium size, rather broad at base and narrow 

 at apex (A), more or less folded (B), more or less waved, and often spiral (C); serra- 

 tions rather dull, shallow and quite regular (D). 



