Arctanthemum arcticum subsp. polare

(Hultén) Tzvelev

in A. I. Tolmatchew, Fl. Arct. URSS 10: 116. 1987.

Common names: Polar daisy chrysanthème polaire
Illustrated
Basionym: Chrysanthemum arcticum subsp. polare Hultén Svensk Bot. Tidskr. 43: 776. 1949
Synonyms: Arctanthemum hultenii (Á. Löve & D. Löve) Tzvelev Dendranthema arcticum subsp. polare (Hultén) Heywood Dendranthema hultenii (Á. Löve & D. Löve) Tzvelev
Treatment appears in FNA Volume 19. Treatment on page 537. Mentioned on page 536.

Plants (2.5–)5–20(–26) cm (more in fruit). Stems not branched. Leaves mostly basal (cauline to midstem at most); basal and proximal: petioles 4–50 mm, blades cuneate to spatulate, 6–30 × 4–16 mm, mostly 0–3-lobed; cauline: petioles 0 or 10–25 mm, blades 4–23 × 1–8 mm. Heads 1(–2), 13–20 mm diam. (flattened, excluding rays). Peduncular bracts 6–12 × 1 mm. Ray laminae (7–)9–18(–21) × (1.5–)1.8–4.3 mm, veins 4–5(–12). 2n = 18.


Phenology: Flowering summer.
Habitat: Open, coastal, wet, brackish habitats on clay, sand, gravel, or rocks, beaches near tideline, coastal dunes, beach meadows, carex salt marshes, estuarine marshes and flood plains, coastal tundra
Elevation: 0–10 m

Distribution

V19-934-distribution-map.gif

Man., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, arctic Russia.

Discussion

In North America, subsp. polare ranges more or less continuously from St. Lawrence Island and the Seward Peninsula (Alaska) in the west, to the Ungava Peninsula (Quebec) in the east, along the low arctic continental coast, the coast of Hudson Bay, and the southern coast of the lower islands of the Arctic Archipelago.

Selected References

None.

Lower Taxa

None.
Luc Brouillet +
(Hultén) Tzvelev +
Chrysanthemum arcticum subsp. polare +
Polar daisy +  and chrysanthème polaire +
Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +  and arctic Russia. +
0–10 m +
Open, coastal, wet, brackish habitats on clay, sand, gravel, or rocks, beaches near tideline, coastal dunes, beach meadows, carex salt marshes, estuarine marshes and flood plains, coastal tundra +
Flowering summer. +
in A. I. Tolmatchew, Fl. Arct. URSS +
Illustrated +
Arctanthemum hultenii +, Dendranthema arcticum subsp. polare +  and Dendranthema hultenii +
Arctanthemum arcticum subsp. polare +
Arctanthemum arcticum +
subspecies +