Si4 



BOTANICAL GAZETTE 



Ltune 



telia. It will be seen that the two forms overlap along an uncer- 

 tain line running from eastern Massachusetts not far from the 

 Atlantic coast to northern Delaware, then through northern Vir- 

 ginia and West Virginia, south-central Ohio and Indiana to central 

 Illinois, thence northward along the Mississippi River. On the 

 Pacific coast the region within ioo miles or less from the sea is 

 occupied apparently by the short cycle form from Mount St. Elias 



<$?> <&*?<■■ 



\ 



Fig. i.— Distribution in North America of Gymnoconia inter stitialis (vertical lines) 

 and Kunkelia nitens (oblique lines). 



to southern California, and by the long cycle form from Moun 

 St. Elias northward and westward into Asia. No collections ar< 

 known from the arid region of the plains and Rockv Mountains 



decision, 

 most are 



forms overlap must 



seems 



and 



southernmost 





