Leaf blades hairy or glabrous. Scapes glabrous or hairy. Inflorescences: sheath length usually 0.5–0.75 times diam. of flower head; outer involucral bracts 0.5–0.75 times length of flower head. Flowers monomorphic: stigmas papillate, pollen coarsely reticulate; calyx hairy throughout or on ribs only. 2n = 18.

Phenology: Flowering summer.
Habitat: Gravelly tundras, flood plains, lakes and seashores, alpine meadows
Elevation: 0-1200 m

Distribution

• Generated Map
• Legacy Map

Greenland, Man., Nfld. and Labr., N.W.T., Nunavut, Ont., Yukon, Alaska, Colo., Eurasia.

Discussion

The population of subsp. sibirica in Colorado is found on Hoosier Ridge. Plants with calyces hairy throughout and hairy scapes appear in eastern North America east of approximately 100°W longitude mixed with plants with hairy calyx ribs and glabrous scapes. Plants from this area have been called var. labradorica; there is no taxonomic reason for this recognition (C. Lefèbvre and X. Vekemans 1995).

Selected References

None.

Lower Taxa

None.