Wittrock & Nordstedt, Algae Aquae Dulcis Exs.Wittrock, V.B.; Nordstedt, C.F.O. [1 - 1200]
University Herbarium, University of California, Berkeley
O. Nordstedt #s.n. 13 August 1883
Spirogyra arcta (C.Agardh) Endlichter
Sweden, Sueciae in fossa ad Vedborn paroeciae Högby
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Miami University - Algae
O. Nordstedt #s.n. 13 August 1883
Spirogyra catenaeformis (Hassall) Kützing
Sweden, Öland (Öl), ad Vedborn paroeciæ Högby Ölandiæ
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