MUTANTS AND HYBRIDS OF THE OENOTHERAS. 



39 



ous, shorter, and evidently less closely correlated with their position 

 on the axis, but show a tendency to group themselves somewhat above 

 the base, so that the plant resembles the framework of an inverted 

 umbrella. (Cf. PL XIX, fig. i, and PL XXI.) 



C5 00 I- 



to lO 



