640806a Dryas integrifolia subsp. integrifolia
Distribution
West Chukotka: Scattered
Wrangel Island: Frequent
South Chukotka: Scattered
East Chukotka: Frequent
Western Alaska: Frequent
Northern Alaska - Yukon: Frequent
Central Canada: Frequent
Hudson Bay - Labrador: Frequent
Ellesmere Island: Frequent
Western Greenland: Frequent
Eastern Greenland: Frequent
Northern arctic Tundra: Rare
Mid Arctic Tundra: Frequent
Southern Arcti Tundra: Frequent
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- Dryas chamissonis Spreng. ex Jurtz., Fl. Arct. URSS 9, 1: 322, 283 (1984). Holotype (LE): Russian Far East: East Chukotka, "ad sin. St. Laurent.", leg. Eschscholtz. - Dryas integrifolia subsp. chamissonis (Spreng.) Scoggan, Fl. Canada 1: 51 (1978).
2n=
18 (2x). - Far East (N), Alaska, Canada, Greenland. - Numerous reports, a few for D. chamissonis.
Geography: Amphi-Beringian - North American (N): RFE ALA CAN GRL.
Notes: Elven and Murray: Yurtsev proposed Dryas chamissonis to be a species apart from D. integrifolia, with a nearly identical range from West Chukotka east to eastern Greenland. He stated that as a member of hybrid or hybridogeneous combinations, D. chamissonis is often not distinguishable from D. integrifolia due to the increased number of teeth on leaves of such plants. We do not accept D. chamissonis and consider it a recurrent part of the morphological variation throughout the range of D. integrifolia subsp. integrifolia.
Yurtsev proposed as canescent varieties D. integrifolia var. canescens Simmons, Vasc. Pl. Ellesmereland: 46 (1906), from RFE to GRL, and D. chamissonis var. incana Jurtz., Fl. Arct. URSS 9, 1: 323 (1984), from RFE and ALA. He commented on canescent forms in general (see his notes to the genus above) and especially about var. canescens that it is "a cryo-xerophilous calcicolous ecotype with a rather disjunctive distribution; the range is incompletely known".
Higher Taxa
- Dryas integrifolia [640806,species]