340105 Elymus macrourus (Turcz.) Tzvelev
Kanin - Pechora: Rare
Polar Ural - Novaya Zemlya: Scattered
Yamal - Gydan: Scattered
Taimyr - Severnaya Zemlya: Rare
Anabar - Onenyo: Rare
Yana - Kolyma: Rare
West Chukotka: Frequent
South Chukotka: Frequent
East Chukotka: Frequent
Western Alaska: Scattered
Northern Alaska - Yukon: Frequent
Central Canada: Scattered
Mid Arctic Tundra: Presence uncertain
Southern Arcti Tundra: Rare
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- Tzvelev, Spisok Rast. Gerb. Fl. SSSR Bot. Inst. Vsesoyuzn. Akad. Nauk 18: 30 (1970). - Triticum macrourum Turcz. in Steud., Syn. Pl. Glumac. 1: 343 (1854). Holotype (LE)?: Siberia: the Burjat region, "in sabulosis ad fl. Angaram superiorem", 1834, leg. Kuznetzov. - Agropyron macrourum (Turcz.) Drobow, Trudy Bot. Muz. Imp. Akad. Nauk 16: 86 (1916). - Roegneria macroura (Turcz.) Nevski, Fl. URSS 2: 627 (1934).
28 (4x). - See provisionally entered taxa below.
Geography: European (NE) - Asian (N) - amphi-Beringian.
Notes: Elven and Murray: Tzvelev (1964e) reported only one diagnostic character in each case for separation among Roegneria macroura, R. nepliana (at that time only known from a lost type specimen), R. turuchanensis, and R. jacutensis. They are largely sympatric as the other proposed taxa occur within the wider range of Elymus macrourus s. str. Tzvelev (in comment) expressed doubts about "neplianus" and "turuchanensis" but would prefer them to be mentioned.
Another problem is how the North American and the Asian plants are related. The North American plants are sometimes considered a species, Agropyron sericeum. Tzvelev (in comment) wondered whether Agropyron sericeum may be a subspecies of Elymus macrourus but did not have material available to form an opinion. Campbell and Soreng in Soreng et al. (2003) and Barkworth et al. (2007) synonymized Agropyron sericeum with Elymus macrourus and did not recognize races in that species. Salomon (in comment 1999) doubted whether the North American plants belong within E. macrourus s. str., but as he is part of Barkworth et al. (2007), he must subsequently have accepted the synonymization. In view of these doubts, the Russian subspecies and the North American plant are all entered provisionally.