Arctanthemum arcticum

(Linnaeus) Tzvelev in A. I. Tolmatchew

in A. I. Tolmatchew, Fl. Arct. URSS 10: 115. 1987

Basionyms: Chrysanthemum arcticum Linnaeus Sp. Pl. 2: 889. 1753
Synonyms: Dendranthema arctica (Linnaeus) Tzvelev Leucanthemum arcticum (Linnaeus) de Candolle
Treatment appears in FNA Volume 19. Treatment on page 536.
Perennials, forming tufts of 1–10+ rosettes; rhizomes at or below ground, fleshy, tough, branched; taproots (young plants) 3–6(–10) mm diam. Stems glabrous or sparsely woolly proximally to ± densely white-woolly near heads. Leaves sometimes glaucous; petioles 0–95 mm; bases cuneate to truncate, sheathing to clasping (distal), margins revolute, teeth obtuse to rounded, sometimes mucronulate, faces glabrous or sparsely woolly, glabrescent; basal and proximal cauline blades ± fan-shaped to cuneate or spatulate, 6–50 × 4–35 mm, lobes usually 3–7, apices blunt; distal blades linear, 4–35 × 1–28(–40) mm, bases attenuate, margins crenate, dentate, or entire, apices acute or obtuse; faces ± woolly, glabrescent. Peduncles usually bracteate, bracts 0–4, linear-lanceolate to linear, 6–19 mm. Ray laminae 8–12 mm. Disc corollas: tubes greenish yellow, (1.1–)1.4–2 mm, throats and lobes yellow turning brownish, throats 0.7–1 mm, sometimes very sparsely glandular, lobes (0.25–)0.4–0.6 mm. Cypselae 1.5–2.5 mm. 2n = 18 (72?).



Coastal Alaska and low-arctic Canada, arctic Eurasia, ne Asia (s to Japan).


Subspecies 2 (2 in the flora).

When Hultén described Chrysanthemum arcticum </i>subsp.<i> polare, he mapped the two subspecies. Along the Bering Strait in Alaska, all the material appears to belong to </i>subsp.<i> polare, except at Norton Bay, where a specimen (ALA) could be attributed to </i>subsp.<i> arcticum. That population would be very disjunct from the range of the subspecies along the south coast of Alaska. The two subspecies do not overlap widely in North America.




1 Plants 10–40 cm (more in fruit); stems sometimes branched; blades of basal leaves fan-shaped to cuneate or spatulate, 3–5(–7)-lobed; ray laminae (15–)17–25(–31) mm, veins (5–)8–10(–12) Arctanthemum arcticum subsp. arcticum
1 Plants (2.5–)5–20(–26) cm (more in fruit); stems not branched; blades of basal leaves cuneate to spatulate, 0–3-lobed; ray laminae (7–)9–18(–21) mm, veins 4–5(–7) Arctanthemum arcticum subsp. polare
Facts about "Arctanthemum arcticum"
AuthorLuc Brouillet +
Authority(Linnaeus) Tzvelev in A. I. Tolmatchew +
BasionymsChrysanthemum arcticum +
DistributionCoastal Alaska and low-arctic Canada +, arctic Eurasia + and ne Asia (s to Japan). +
IllustratorYevonn Wilson-Ramsey +
Publication titlein A. I. Tolmatchew, Fl. Arct. URSS +
Publication year1987 +
ReferenceNone +
Source xml grained fna xml/V19-20-21/V19 932.xml +
SynonymsDendranthema arctica + and Leucanthemum arcticum +
Taxon familyAsteraceae +
Taxon nameArctanthemum arcticum +
Taxon parentArctanthemum +
Taxon rankspecies +
VolumeVolume 19 +