090202b Athyrium distentifolium subsp. americanum (Butters) Hultén
Distribution
Western Greenland: Rare
Eastern Greenland: Rare
Southern Arcti Tundra: Presence uncertain
Shrub Tundra: Scattered
Bordering boreal or alpine areas: Frequent
- Hultén, Bot. Not. 126: 462 (1973). - Athyrium alpestre var. americanum Butters, Rhodora 19: 204 (1917). Lectotype (GH): Canada: British Columbia, Selkirk Mountains, Rogers Park, 23. Aug. 1904, leg. Heacock 554. (Maxon 1918: 120). - Athyrium americanum (Butters) Maxon, Amer. Fern J. 8: 120 (1918). - Athyrium distentifolium var. americanum (Butters) Cronquist, Vasc. Pl. Pacific Northwest 1: 63 (1969). - Athyrium alpestre subsp. americanum (Butters) Lellinger, Amer. Fern J. 71: 91 (1981).
2n=
80 (4x). - Far East, Canada. - Taylor and Lang (1963); Mitui (1976).
Geography: Amphi-Pacific & North American (E): GRL.
Notes: Se Kartesz and Gandhi (1991) for a survey of characters separating the two taxa we enter as subspecies, and their arguments for rank as species. Subspecies americanum does not reach the Arctic in mainland North America.
Higher Taxa
- Athyrium distentifolium [090202,species]