176 MISSOURI BOTANICAL GARDEN. 



occurred 



a 



will be published at another time. This race is descended 

 from a single individual grown at Woods Hole in 1908. A 

 total of 376 first-generation offspring of this individual have 

 been grown in the two following years, and also (in 1910) 

 50 plants of the second generation from the self-pollination 

 of one individual of the first generation. The plants of the F x 

 included a total of 15 virescent individuals, or very nearly 

 The 50 plants of the F 2 contained one showing viresce 



4% 



from 



name 



proved to contain two very distinct types, one plant was 

 virescent. This abnormality has not appeared in any others 

 of the many races of which I have grown cultures. 



All the plants showing virescence were affected in exactly 



same 



ff: 



mal and produced fruits, only the later 

 peculiarity. I have not compared the < 

 capsules with those of normal plants, though If this were 

 done it might be found that the virescent tendency was inher- 

 ited more strongly in the former case. In one plant a side 

 .shoot produced flowers which were quite normal while the 

 main stem produced only flowers of the virescent type. 



One plant of 0. multiflora, in which all the flowers but 

 the earliest were virescent, is illustrated in plate 29. The 



described 



may 



Plate 30, f. 1, shows a group of the flowers, 

 natural size. The sepals are green inside and outside, large 

 and bag-like and more or less crinkled or curled. They are 

 tapering at the end, terminating in long, slender sepal tips. 

 Perhaps frondescence or phyllody would be a more suitable 

 term than virescence to apply to this condition, for the sepals 



quite leaf-like. Plate 30, f. 2, shows several 



becom 



of the flower. The petals retain a greenish 



other 



are in all cases very small (usually about half 



d blunt at the tip. The 



