Studies on the Variability and Heritability of Pigmentation in Oenothera. 353 
O. rubrinervis, (b) certain races naturalized near Liverpool, England, 
whose bud characters are in various degrees intermediate between 
O. rubrinervis and grandiflora Ait., and (c) buds having the O. grandi- 
flora characters, from a certain race (No. 49) from the locality above- 
mentioned. The main bud characters of O. grandiflora Ait. and 
I 2 Rie x! 5 6 7 
Fig. 1. Buds of Oenothera, photographed natural size with a ray filter to bring 
out the color pattern. 
From left to right: Buds 1, 2. O. rubrinervis. 
6, 7. O. grandiflora, from race Nr. 49. England. 
3. 4, 5. Intermediate, from Liverpool Oenotheras. 
O. Lamarckiana Ser., have been contrasted in another publication 
(GATES, 1909, pp. I3I, 132). 
It will thus be seen that, in all the forms studied, there is a 
definite type of variation in the anthocyanic pigmentation of the 
buds, the pattern receding more or less regularly from both margins 
of the sepals, and disappearing finally along the median ridge. In 
Induktive Abstammungs- und Vererbungslehre, IV. 23 
