102 BOTANICAL GAZETTE [FEBRUARY 
Ler WIGTO? CAT 
Fic. 9.—F, progeny of Oenothera pratincola mut. nummularia, Lexington C-17; 
the plant in the upper left-hand corner, Lexington C-17-3, is O. pratincola mut. tortuosa, 
here occurring as a secondary mutation, but seemingly the same as one of the very 
rarest primary mutations of O. pratincola; the other plants are typical examples of 
mut. nummularia. 
