Silva Center for Phycological Documentation: Index Nominum Algarum

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Cosmarium praegrandiforme var. americanum ('Americana') J.A. Cushman
Rhodora 7: 257, pl. 64: fig. 5. 1905. (E)
Type locality: USA: New Hampshire: North Conway: Pudding Pond

See Cosmarium praegrandiforme var. americanum (J.A. Cushman) G.W. Prescott 1981
[as Cosmarium grandiforme Schmidle var. Americana; "grandiforme Schmidle" an error for "praegrandiforme Schmidle"?; possibility not addressed by Prescott; Schmidle compared his praegrandiforme to praegrande Lundell]

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