Potamogeton perfoliatus subsp. richardsonii (A. Benn.) Hultén
Publ. & Syn.Hultén, Acta Univ. Lund., n. s., sect. 2, 37, 1: 102 (1941). - Potamogeton perfoliatus var. richardsonii A. Benn., J. Bot. 27: 25 (1889). Lectotype (NY): U.S.A.: Michigan, Lake Superior, "fluvio Ontanagon", 1863, leg. Robbins (Reveal in Cronquist et al. 1977: 42). - Potamogeton richardsonii (A. Benn.) Rydb., Bull. Torrey Bot. Club 32: 599 (1905).
Chromosomes(1) 26 (2x). - Far East (N), Canada, U.S.A. - At least three reports.
(2) 52 (4x). - Asia (S), Canada. - Several reports.
Two ploidy levels are supported even if Löve and Löve (1975a) omitted the reports of diploids.
GeographyAmphi-Beringian - North American: RFE ALA CAN.
Distribution N = F     AN = s     E = S     CC = r     CS = r     AW = r     CW = ?     [ key ]
Parent taxonPotamogeton perfoliatus L.
PAF ID240105b
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Panarctic Flora Editor-in-Chief: Reidar Elven (Natural History Museum, University of Oslo)
Editorial Committee: Reidar Elven, David F. Murray (Museum of the North, University of Alaska), Volodya Yu. Razzhivin (Komarov Botanical Institute, Russian Academy of Sciences), Boris A. Yurtsev [deceased] (Komarov Botanical Institute, Russian Academy of Sciences)