340104c Elymus alaskanus subsp. hyperarcticus (Polunin) Á. Löve & D. Löve s. lat.
Distribution
Yamal - Gydan: Rare
Taimyr - Severnaya Zemlya: Rare
Anabar - Onenyo: Rare
Kharaulakh: Scattered
West Chukotka: Scattered
Wrangel Island: Scattered
South Chukotka: Rare
East Chukotka: Scattered
Western Alaska: Rare
Northern Alaska - Yukon: Frequent
Central Canada: Rare
Hudson Bay - Labrador: Rare
Ellesmere Island: Rare
Western Greenland: Rare
Eastern Greenland: Scattered
Northern arctic Tundra: Rare
Mid Arctic Tundra: Frequent
Southern Arcti Tundra: Frequent
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- Á. Löve & D. Löve, Bot. Not. 128: 502 (1976). - Agropyron violaceum var. hyperarcticum Polunin, Bot. Canad. E. Arctic: 95 (1940). Holotype (BM): Canada: Nunavut, Baffin Island, Arctic Bay, 09. Sept. 1936, leg. N. Polunin 2531. - Roegneria hyperarctica (Polunin) Tzvelev, Fl. Arct. URSS 2: 244 (1964). - Agropyron boreale subsp. hyperarcticum (Polunin) Melderis, Ark. Bot., n. s., 7, 1: 19 (1968). - Elymus hyperarcticus (Polunin) Tzvelev, Novosti Sist. Vyssh. Rast. 9: 61 (1972). - Elymus sajanensis subsp. hyperarcticus (Polunin) Tzvelev, Novosti Sist. Vyssh. Rast. 10: 24 (1973).
2n=
28 (4x). - Far East (N), Canada, Greenland. - At least five reports.
Geography: Asian (N/C) - amphi-Beringian - North American (N): SIB RFE ALA CAN GRL.
Notes: Elven and Murray: Tzvelev (PAF proposal) assigned subsp. hyperarcticus to Elymus sajanensis. Soreng et al. (2000 onwards, CNWG web version) accepted it as species, but Campbell and Soreng in Soreng et al. (2003, CNWG printed version) and Barkworth et al. (2007) later considered it a subspecies of E. alaskanus. These authors, however, synonymized E. sajanensis with E. alaskanus subsp. borealis.
Elymus sajanensis (Nevski) Tzvelev, Novosti Sist. Vyssh. Rast. 9: 61 (1972) [Roegneria sajanensis Nevski in Kom., Fl. URSS 2: 624 (1934)] with type (LE, holotype?) from southern Siberia: the Sayan Mountains, Tuniskii region, Garganskii pass, 31. July 1902, leg. V. Komarov. Tzvelev (PAF proposal) accepted three taxa as subspecies of E. sajanensis. See the discussion by Tzvelev (1964e) where only one differential character discriminated between subsp. hyperarcticus and subsp. villosus. The three subspecies are largely sympatric. The same seems to be the case with subsp. caeruleus. Subspecies villosus has elsewhere been included in E. alaskanus. The two taxa "caeruleus" and "villosus" are entered provisionally below.
Higher Taxa
- Elymus alaskanus [340104,species]