38 



visited to determine if the white flowers were of occasional oc- 

 currence as in 1931 at Nebraska, failed in each instance to locate 

 plants producing blue flowers. Along streams tributary to the 

 Allegheny River on the other side of the divide we found blue 

 flowers but failed to find the white. 



The indication is that f. albiflora is well established in the 

 Tionesta Creek Valley in Forest County and that, in this re- 

 gion, it reproduces regularly with white or cream-colored flow- 

 ers without reversion to the blue form which is typical for the 

 species, G. Andrewsii. 



Pittsburgh, Pa. 



