Collins, Holden & Setchell, Phycoth. Bor.-Amer.Collins, F.S.; Holden, I.; Setchell, W.A. [1-2300]
University of Michigan
F.S. Collins #s.n. 13 August 1910
Spirogyra porticalis var. tenuispira
United States, Massachusetts, Middlesex, Lower Pond, Wakefield
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