| Elymus alaskanus subsp. hyperarcticus (Polunin) Á. Löve & D. Löve s. lat. | |
| Publ. & Syn. | 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). |
| 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. |
| Chromosomes | 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. |
| Distribution | N = F AN = f B = R AO = r C = F GW = r D = F E = F CC = r WI = s YG = r HL = r EP = r CE = s CS = r AW = r GE = s Kh = s CW = s Tm = r [ key ] |
| Parent taxon | Elymus alaskanus (Scribn. & Merr.) Á. Löve |
| PAF ID | 340104c |