NEW DIMORPHIC MUTANTS OF THE OENOTHERAS. 



Fig. 2. -Oenothera Lamarckiana mut. cana: flowering spikes of the two types into which 

 each generation splits; on the left the Lamarckiana type, on the right the parental 

 type, showing the thin buds and the bent tips of the calyx; the difference in height of 

 the 2 spikes' is the same as the mean difference in height of the 2 groups on the bed; 

 third generation of mut. cana no. 3, photographed July 22, 1914. 



