Publication: Deutschl. Fl., ed. 3. 1: 855. 1823.

Origin: Native

Herbarium search: CPNWH

Notes: Often mistaken for P. friesii.

FNA22: "Potamogeton obtusifolius is a distinctive linear-leaved species with the leaf blades round at the apex, especially when fruiting inflorescences 5--7 mm wide are present. This is unusually wide for one of the linear-leaved species.

Two hybrids, Potamogeton obtusifolius x P. pusillus (= P. x saxonicus Hagström) and P. friesii x obtusifolius (= P. x semifructus A. Bennett ex Ascherson & Graebner), have been described."

Last updated 9/17/2023 by David Giblin.