Anonymous, Pl. Exs. Grayan.
Anonymous [1 - 1500 or more]

Sul Ross University, A. Michael Powell Herbarium
Catalog #: 00006626
F.H. Steinmetz #539 00 September 1937
Potamogeton mysticus Morong
USA, Maine, Cumberland, Stuart Brook, West Scarboro, Scarboro.

Intermountain Herbarium (Vasc. & Algae)
Catalog #: UTC00057718
F.H. Steinmetz #539 00 September 1937
Potamogeton perfoliatus x Potamogeton pusillus hybrid formula
United States, Maine, Cumberland, Stuart Brook, West Scarboro, Scarboro