Potamogeton sparganiifolius Laest. ex Fr.
Annotated by Adolf Ceska.

British Columbia: Vancouver Island, Silver Lake, Duncan.
48.908333° N, 123.866667° W,
Potamogeton x sparganiifolius: Hybrid P. gramineus X P. natans.

Adolf Ceska | Oldriska Ceska | Patrick D. Warrington s.n., 1975 Jul 19
UBC, Accession: V217773