240105b Potamogeton perfoliatus subsp. richardsonii (A. Benn.) Hultén
Distribution
West Chukotka: Presence uncertain
South Chukotka: Rare
Western Alaska: Rare
Northern Alaska - Yukon: Scattered
Central Canada: Rare
Shrub Tundra: Scattered
Bordering boreal or alpine areas: Frequent
- 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).
2n=
(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.
Geography: Amphi-Beringian - North American: RFE ALA CAN.
Higher Taxa
- Potamogeton perfoliatus [240105,species]