POTAMOGETON VASEYI IN NORTHEASTERN OHIO. 



O. E. Jennings. 



Potamogeton Vaseyi Robbins is an interesting little water 

 plant which deserves to be listed among the other rare or 

 noteworthy plants occurring in the northeastern part of Ohio. 

 Prof. L. S. Hopkins, Kent Normal School, collected this species 

 at Brady's Lake, Portage County, June 22, 1913, the plant 

 then being in flower. This last year Mr. John Bright, Glenshaw, 

 Pa., collected it with the spikes bearing partly mature achenes 

 on July 28, 1918, at the mouth of Cowles Creek, near Geneva- 

 on-the-Lake, Ashtabula County. 



The range of the species is reported as "Quebec to Wiscon- 

 sin, south to southern New York" (Britton and Brown. 111. 

 Flora, 1 : 83. 1913), or Maine to Ontario, south to Connecticut, 

 New York, Ohio, Illinois, and Minnesota, local (Gray's New 

 Manual of Botany. 1908). The species is not known to occur in 

 northwestern Pennsylvania, although it occurs in the Scranton 

 district, in the northeastern part of that state. (Flora of North- 

 eastern Pennsylvania. Alfred Twining. 1917). 



Two other pond-weeds were collected from Cowles Creek 

 by Mr. Bright: Potamogeton foliosus Raf., and P. americana 

 Cham. & Schl. 



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