Arctanthemum arcticum subsp. polare

(Hultén) Tzvelev in A. I. Tolmatchew

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.
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Luc Brouillet +
(Hultén) Tzvelev in A. I. Tolmatchew +
0.6 cm6 mm <br />0.006 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
glabrescent +
attenuate +
Chrysanthemum arcticum subsp. polare +
compound +  and simple +
0.4 cm4 mm <br />0.004 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
0-3-lobed;cuneate;spatulate +
1mm;8mm +
linear-lanceolate +  and linear +
Polar daisy +  and chrysanthème polaire +
zygomorphic +, actinomorphic +  and (3-)5-merous +
yellow +  and white +
winged +  and monomorphic +
cylindro-obconic +
fertile +  and bisexual +
fertile +  and bisexual +
2.8 cm28 mm <br />0.028 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +  and arctic Russia +
0–10 m +
sheathing +  and clasping +
gland-dotted +
glabrescent +, woolly +  and glabrous +
mucronulate;obtuse;rounded +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
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 +
in 2s +  and singly +
indeterminate +
1.3 cm13 mm <br />0.013 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
heterogamous +  and homogamous +
each +  and sessile +
1.3 cm13 mm <br />0.013 m <br /> (2.9 cm29 mm <br />0.029 m <br />) +
patelliform;hemispheric +
elliptic to oblong or oblong-lanceolate +  and lance-elliptic +
sessile +  and petiolate +
0.025 cm0.25 mm <br />2.5e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
yellow turning brownish +
deltate +
sheathing +  and clasping +
entire +  and dentate +
woolly +  and glabrous +
crenate +, mucronulate +, obtuse +  and rounded +
2-carpellate +
persistent +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
0.4 cm4 mm <br />0.004 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering summer. +
25 +  and 34 +
in A. I. Tolmatchew, Fl. Arct. URSS +
1.8 cm18 mm <br />0.018 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
bearing subulate enations +, hairy +  and bristly +
dome--shaped +
below-ground +
5 +  and 8 +
exalbuminous +
Illustrated +
not branched +
appendaged +  and truncate +
papillate +
Arctanthemum hultenii +, Dendranthema arcticum subsp. polare +  and Dendranthema hultenii +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Arctanthemum arcticum subsp. polare +
Arctanthemum arcticum +
subspecies +
yellow turning brownish +
campanulate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
sheathing +  and clasping +
woolly +  and glabrous +
mucronulate +, obtuse +  and rounded +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
greenish yellow +
cylindric +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
4 +  and 5 +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
cauline +, proximal +  and basal +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +