240114 Potamogeton subsibiricus Hagstr.
Distribution
Kanin - Pechora: Rare
Polar Ural - Novaya Zemlya: Rare
Taimyr - Severnaya Zemlya: Scattered
Yana - Kolyma: Rare
West Chukotka: Rare
South Chukotka: Rare
East Chukotka: Rare
Western Alaska: Rare
Northern Alaska - Yukon: Rare
Central Canada: Rare
Hudson Bay - Labrador: Present only in the Borderline Arctic
Shrub Tundra: Rare
Bordering boreal or alpine areas: Scattered
- Hagstr., Kongl. Svenska Vetenskapsakad. Handl., n. s., 55, 5: 84 (1916). Described from Nikandrovsk Island near Dudinka at the lower Jenisei River (Siberia). - Potamogeton sibiricus subsp. subsibiricus (Hagstr.) Tzvelev, Novosti Sist. Vyssh. Rast. 32: 182 (2000).
- Potamogeton porsildorum Fernald, Mem. Amer. Acad. Arts, n. s., 17, 1: 40 (1932). Described from the Mackenzie River Delta in the Northwest Territories (Canada).
Geography: Asian (N) - amphi-Beringian - North American: RUS SIB RFE ALA CAN.
Notes: Haynes and Hellquist (2000c) considered Potamogeton subsibiricus a species, Tzvelev (2000c) a subspecies of P. sibiricus. Kashina (1988) reported the following diagnostic features vs. P. sibiricus: stem more slender (0.5-1 vs. 1 mm), leaves with fewer veins (13-17 vs. 17-21), stipules brownish vs. pallid, inflorescence interrupted and in 3-4 whorls vs. nearly continuous, and fruiting peduncle straight vs. curved. The range of the rare P. sibiricus falls inside that of the more widespread P. subsibiricus. We have chosen the option of two species in absence of more information. We are, however, in doubts whether these really are two taxa.
Higher Taxa
- Potamogeton [2401,genus]