View source for Arctanthemum arcticum

{{Treatment/ID
|accepted_name=Arctanthemum arcticum
|accepted_authority=(Linnaeus) Tzvelev
|publications={{Treatment/Publication
|title=in A. I. Tolmatchew, Fl. Arct. URSS
|place=10: 115. 1987
|year=1987
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Chrysanthemum arcticum
|authority=Linnaeus
|rank=species
|publication_title=Sp. Pl.
|publication_place=2: 889. 1753
}}
|synonyms={{Treatment/ID/Synonym
|name=Dendranthema arctica
|authority=(Linnaeus) Tzvelev
|rank=species
}} {{Treatment/ID/Synonym
|name=Leucanthemum arcticum
|authority=(Linnaeus) de Candolle
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Anthemideae;Arctanthemum;Arctanthemum arcticum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Anthemideae]]</div><div class="higher-taxon"><small>genus</small>[[Arctanthemum]]</div><div class="higher-taxon"><small>species</small>[[Arctanthemum arcticum]]</div></div>
|volume=Volume 19
|mention_page=
|treatment_page=page 536
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> forming tufts of 1–10+ rosettes; rhizomes at or below ground, fleshy, tough, branched; taproots (young plants) 3–6(–10) mm diam. <b>Stems</b> glabrous or sparsely woolly proximally to ± densely white-woolly near heads. <b>Leaves</b> 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. <b>Peduncles</b> usually bracteate, bracts 0–4, linear-lanceolate to linear, 6–19 mm. <b>Ray</b> laminae 8–12 mm. <b>Disc</b> 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. <b>Cypselae</b> 1.5–2.5 mm. <b>2n</b> = 18 (72?).</span><!--

-->{{Treatment/Body
|distribution=B.C.;Man.;N.W.T.;Nunavut;Ont.;Que.;Yukon;Alaska;Coastal Alaska and low-arctic Canada;arctic Eurasia;ne Asia (s to Japan).
|discussion=<p>Subspecies 2 (2 in the flora).</p><!--
--><p>When Hultén described Chrysanthemum arcticum <i></i>subsp.<i> polare</i>, he mapped the two subspecies. Along the Bering Strait in Alaska, all the material appears to belong to <i></i>subsp.<i> polare</i>, except at Norton Bay, where a specimen (ALA) could be attributed to <i></i>subsp.<i> arcticum</i>. 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.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|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|Arctanthemum arcticum subsp. arcticum]]
|-id=key-0-1
|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|Arctanthemum arcticum subsp. polare]]
|}
</div></div><!--

-->{{#Taxon:
name=Arctanthemum arcticum
|authority=(Linnaeus) Tzvelev
|rank=species
|parent rank=genus
|synonyms=Dendranthema arctica;Leucanthemum arcticum
|basionyms=Chrysanthemum arcticum
|family=Asteraceae
|distribution=B.C.;Man.;N.W.T.;Nunavut;Ont.;Que.;Yukon;Alaska;Coastal Alaska and low-arctic Canada;arctic Eurasia;ne Asia (s to Japan).
|reference=None
|publication title=in A. I. Tolmatchew, Fl. Arct. URSS
|publication year=1987
|special status=Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V19_932.xml
|tribe=Asteraceae tribe Anthemideae
|genus=Arctanthemum
|species=Arctanthemum arcticum
}}<!--

-->[[Category:Treatment]][[Category:Arctanthemum]]