Collins, Holden & Setchell, Phycoth. Bor.-Amer.Collins, F.S.; Holden, I.; Setchell, W.A. [1-2300]
Brown University - Algae
I. Holden s.n. 08 May 1892
Spirogyra porticalis (O.F.Müller) Dumortier
United States, Connecticut, Brookfield, CT
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Yale University Herbarium
Isaac Holden s.n. 08 May 1892
Spirogyra porticalis (O.F.Müller) Dumortier
United States, Connecticut, Brookfield; Brookfield, CT
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University of Michigan
Isaac Holden #s.n. 08 May 1892
Spirogyra porticalis f. minor (O.F.Müller) Dumortier
United States, Connecticut, Fairfield, Brookfield
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University of Michigan
Isaac Holden #s.n. 08 May 1892
Spirogyra porticalis f. minor (O.F.Müller) Dumortier
United States, Connecticut, Fairfield, Brookfield
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Michigan State University Algae
Isaac Holden #s.n. 08 May 1892
Spirogyra porticalis (O.F.Müller) Dumortier
United States, Connecticut, Fairfield, Brookfield
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Miami University - Algae
Isaac Holden #s.n. 08 May 1892
Spirogyra porticalis (O.F.Müller) Dumortier
United States, Connecticut, Fairfield, Brookfield
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