860701 Erigeron compositus Pursh
Distribution
West Chukotka: Rare
Wrangel Island: Frequent
Western Alaska: Rare
Northern Alaska - Yukon: Rare
Central Canada: Scattered
Hudson Bay - Labrador: Rare
Ellesmere Island: Frequent
Western Greenland: Scattered
Eastern Greenland: Frequent
Polar desert: Presence uncertain
Northern arctic Tundra: Rare
Mid Arctic Tundra: Frequent
Southern Arcti Tundra: Frequent
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- Pursh, Fl. Amer. Sept. 2: 535 (1813). Holotype (PH): U.S.A.: Idaho, "on the banks of the Kooskoosky", probably near Lewiston, leg. Lewis.
- Erigeron gormanii Greene, Pittonia 4: 156 (1900). Type: Canada: the Yukon Territory, Fort Selkirk on the Yukon River, 28. June 1899, leg. M.W. Gorman.
2n=
(1) 18 (2x). - Canada (W), U.S.A. (W). - At least three reports, one for var. glabratus.
(2) 36 (4x). - U.S.A. (W). - At least three reports.
(3) 45 (5x). - U.S.A. (Montana, California). - Noyes and Soltis (1996).
(4) 54 (6x). - Far East (N), Canada, U.S.A. (W), Greenland. - Numerous reports, two for var. glabratus.
(5) 58-59. - Solbrig et al. (1969).
(6) 63 (7x). - U.S.A. (SW), Greenland. - At least three reports.
(7) 80 (c. 9x). - U.S.A. (Oregon). - Noyes and Soltis (1996).
Geography: Amphi-Beringian (E) - North American (N) - Cordilleran: RFE ALA CAN GRL.
Notes: Erigeron compositus is an aggregate of several morphologically perhaps separable sexual diploids with 2n = 18 (Beaman 1977) and a complicated superstructure of agamospermous polyploids with 2n = 36-80 (Noyes et al. 1995; Noyes and Soltis 1996). The sexuals are Cordilleran. Beaman proposed five of these as informal subspecies. All the plants that reach the Arctic in northeastern Asia, North America, and Greenland seem to be polyploids and probably agamospermous.
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Source: Wsiegmund at Wikispecies
Higher Taxa
- Erigeron [8607,genus]