No. 532] GENETIC AL STUDIES ON OENOTHERA 205 



(grandiflora E) is too far from the general type of gran- 

 diflora to be of value in the present study. 



3. A type represented by a plant (grandiflora Z) with 

 narrow lanceolate leaves, much too narrow to give re- 

 sults, if cvossed with hleiuiis, that would approach La- 

 niarckiana. 



The chief characteristics of the grandiflora strains A, 

 B, and D, employed in the hybrid studies of the present 

 paper, when under good cultivation are as follows: 



"road, have about 20 loosely clustered "leaves, broadly 

 elliptical, irregularly and sometimes deeply cut at the 

 base, slightly crinkled, and mottled with reddish brown 

 blotches. The rosettes are transitory, the leaves with- 

 ering during the development of the main stem. 



