Migula, Sydow & Wahlstedt, Characeae Exs.
Migula, E.F.A.W.; Sydow, P.; Wahlstedt, L.J. [1 - 150]

Field Museum of Natural History
Catalog #: C0544724F
P. Sydow #s.n.
Nitellopsis obtusa (N.A.Desvaux) J.Groves
Germany, Berlin: Botanic Garden