Podostemum ceratophyllum Michx.

Montana: Flathead County: Swan River ~5 miles north of Swan Lake. Swan River drainage (ultimately Flathead River.) Elev. 3100 ft.
Attached to rocks close to shore, in swift water. Phenology: Vegetative.

P. A. Meyers s.n., Jul 10, 1967
WCW, Accession: 3219