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

The New York Botanical Garden
Catalog #: 2021509
Otto Nordstedt s.n. 00 September 1872
Nitella flexilis variety crassa A. Braun
, Nericiae ad Aspa in lacu Wettern inter Nit translucentem