Wittrock & Nordstedt, Algae Aquae Dulcis Exs.
Wittrock, V.B.; Nordstedt, C.F.O. [1 - 1200]

University Herbarium, University of California, Berkeley
Catalog #: UC759509
Frank S. Collins #s.n. 00 August 1891
Spirogyra varians (Hassall) Kützing
United States, Maine, Hancock, Eagle Island, Penobscot Bay