Wartmann & Schenk, Schweiz. Krypt.
Wartmann, F.B.; Schenk, B. [1 - 700]

Field Museum of Natural History
Catalog #: C0536275F
J. Jäggi #s.n.
Nitella capitata (C.C.Nees) C.Agardh
Switzerland, Roggwyl (Bern).

The New York Botanical Garden
Catalog #: 2020846
J. Jäggi #[s.n.]
Nitella capitata (Nees) C. Agardh
Switzerland, In Fischteichen bei Roggwyl (Bern).