500710 Saxifraga tricuspidata Rottb.
Distribution
Western Alaska: Rare
Northern Alaska - Yukon: Frequent
Central Canada: Frequent
Hudson Bay - Labrador: Frequent
Ellesmere Island: Scattered
Western Greenland: Frequent
Eastern Greenland: Rare
Polar desert: Rare
Northern arctic Tundra: Frequent
Mid Arctic Tundra: Frequent
Southern Arcti Tundra: Frequent
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- Rottb., Skr. Kiøbenhavnske Selsk. Lærd. Elsk. 10: 446 (1770). Holotype (C, Herb. Egede): Greenland: "Grønland", 1739, leg. H. Egede. - Leptasea tricuspidata (Rottb.) Haw., Saxifr. Enum.: 40 (1821).
- Saxifraga tricuspidata ? var. subintegrifolia Abrom., Biblioth. Bot. 8, 42, 2: 36 (1899). Described from Greenland. - Saxifraga tricuspidata f. subintegrifolia (Abrom.) Polunin, J. Bot. 76: 100 (1938).
2n=
26 (2x). - Alaska, Canada, Greenland. - Several reports.
Geography: North American (N): ALA CAN GRL.
Notes: Saxifraga tricuspidata differs much from the other species of this section. The major part of its range is in non-Beringian Canada and Greenland, well outside the range of all other species of the section.
Zhmylev: Saxifraga tricuspidata is a North American, arctic-alpine species of considerable morphological variability. Plants with entire or almost entire leaves (var. subintegrifolia) are sometimes found in Greenland and Canada. These plants differ from the other arctic plants with entire leaves of section Trachyphyllum (i.e., the S. bronchialis and S. spinulosa aggregates) by elongated glands on cilia along the leaf margins.
Elven: Forma subintegrifolia is stated to occur sporadically throughout the range (see, e.g., Polunin 1940) and probably does not deserve any special attention.
Higher Taxa
- Saxifraga [5007,genus]