Publication: Arch. Bot. (Leipzig). 3: 331. 1805.

Origin: Native

selected vouchers: WTU

Notes: FNA22: "Potamogeton praelongus is one of the easiest pondweeds to identify with its submersed leaves only clasping the more or less zigzagged stem. The persistent, hugelarge, white stipules provide another clue to this species.

Four hybrids, Potamogeton perfoliatus x P. praelongus (= P. x cognatus Ascherson & Graebner), P. alpinus x P. praelongus (= P. x griffithii A. Bennett), P. crispus x P. praelongus (= P. x undulatus Wolfgang ex Schultes & Schultes f.), and P. gramineus ´ P. praelongus (= P. x vilnensis Galinus), have been described."

BCIL7 incorrectly gives author as: "Wolfg."

References: (none)