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132 



CONTRIBUTIONS FKOM THE NATIONAL HERBARIUM, 



Type U. S. National Herbarium no. 4G1983, collected by Dr. C, G. Pringle on 

 Sierra de Tepoxtlan, September 8, 1<)0(> (no. l;?768); previously collected l)y J, N. 

 Rose at same station (August 7, 1906, no, 11 127). 



This is a very peculiar species, differing from all others wbich I have ever seen in 



The leaflLts are alwo j)eculiar in havin^^ the apex oblique, one 



being stolon iferou^- 



lobe usually being much longer than the other. 



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