Arctanthemum arcticum subsp. arcticum

Common names: Arctic daisy
Treatment appears in FNA Volume 19. Treatment on page 537. Mentioned on page 536.

Plants 10–40 cm (more in fruit). Stems sometimes branched. Leaves basal and cauline (cauline to beyond midstem, regularly distributed); basal and proximal: petioles 15–95 mm, blades fan-shaped to cuneate or spatulate, 15–50 × 4–35 mm, 3–5(–7)-lobed; cauline: petioles 0–55 mm, blades 6–35 × 4–28 mm. Heads 1–2(–3), 19–29 mm diam. (flattened, excluding rays). Peduncular bracts 9–19 × 1–2 mm. Ray laminae (15–)17–25(–31) × (3.2–)3.4–5.5(–8.2) mm, veins (5–)8–10(–12).


Phenology: Flowering summer.
Habitat: Open, coastal, wet, brackish habitats on clay, sand, gravel or rocks, upper tidal marshes, brackish coastal meadows, coastal herbaceous or heath tundras, sloughs, coastal rocks, flood plains and bars at mouths of streams
Elevation: 0–10 m

Distribution

V19-933-distribution-map.gif

B.C., Alaska, ne Asia (Japan, Russian East Coast).

Discussion

Subspecies arcticum is coastal from northern Japan and Russia to North America as far as northwestern British Columbia. It is cultivated as an ornamental. The chromosome number 2n = 72 has been reported from Russia for the species; it is uncertain to what subspecies this number may belong. No report apparently exists for this subspecies in North America.

Selected References

None.

Lower Taxa

None.

Luc Brouillet +
(Linnaeus) Tzvelev in A. I. Tolmatchew +
Chrysanthemum arcticum +
Arctic daisy +
B.C. +, Alaska +, ne Asia (Japan +  and Russian East Coast). +
0–10 m +
Open, coastal, wet, brackish habitats on clay, sand, gravel or rocks, upper tidal marshes, brackish coastal meadows, coastal herbaceous or heath tundras, sloughs, coastal rocks, flood plains and bars at mouths of streams +
Flowering summer. +
in A. I. Tolmatchew, Fl. Arct. URSS +
Illustrated +
Dendranthema arctica +  and Leucanthemum arcticum +
Arctanthemum arcticum subsp. arcticum +
Arctanthemum arcticum +
subspecies +