View source for Rumex arcticus

{{Treatment/ID
|accepted_name=Rumex arcticus
|accepted_authority=Trautvetter in A. T. von Middendorff
|publications={{Treatment/Publication
|title=in A. T. von Middendorff, Reise Siber.
|place=1(2,1): 29. 1847
|year=1847
}}
|common_names=Arctic dock
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Rumex aquaticus subsp. arcticus
|authority=(Trautvetter) Hiitonen
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Rumex arcticus var. kamtschadalus
|authority=(Komarov) Rechinger f. ex Tolmatchew
|rank=variety
}} {{Treatment/ID/Synonym
|name=Rumex arcticus var. latifolius
|authority=Tolmatchew
|rank=variety
}} {{Treatment/ID/Synonym
|name=Rumex domesticus var. nanus
|authority=Hooker
|rank=variety
}} {{Treatment/ID/Synonym
|name=Rumex kamtschadalus
|authority=M. M. Maximova
|rank=species
}} {{Treatment/ID/Synonym
|name=Rumex longifolius var. nanus
|authority=(Hooker) Meisner
|rank=variety
}} {{Treatment/ID/Synonym
|name=Rumex ursinus
|authority=
|rank=species
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Rumex;Rumex subg. Rumex;Rumex sect. Rumex;Rumex arcticus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polygonaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Polygonaceae subfam. Polygonoideae]]</div><div class="higher-taxon"><small>genus</small>[[Rumex]]</div><div class="higher-taxon"><small>subgenus</small>[[Rumex subg. Rumex]]</div><div class="higher-taxon"><small>section</small>[[Rumex sect. Rumex]]</div><div class="higher-taxon"><small>species</small>[[Rumex arcticus]]</div></div>
|volume=Volume 5
|mention_page=page 494, 503, 519
|treatment_page=page 518
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial, glabrous or nearly so, with fusiform, oblique rootstock, occasionally with horizontal, short-creeping rhizome. <b>Stems</b> erect, simple or branched in distal 2/3 (then with few, comparatively short branches), 10–70(–100) cm. <b>Leaves</b>: ocrea deciduous or partially persistent at maturity; blade narrowly lanceolate, lanceolate, or oblong-lanceolate, normally 5–15(–20) × 1.5–5 cm, base cuneate to broadly cuneate, rarely truncate or very weakly cordate, margins entire or rarely indistinctly repand, flat, apex acute or subacute. <b>Inflorescences</b> terminal, occupying distal 1/2–2/3 of stem, interrupted, paniculate, simple or nearly so (branches, when present usually less than 7–8 cm). <b>Pedicels</b> articulated in proximal 1/3, filiform, 5–13(–17) mm, usually not more than 2–2.5 times as long as inner tepals, articulation weakly evident, not swollen. <b>Flowers</b> 7–15 in whorls; inner tepals ovate, 4.5–7.5(–8) × 4–6(–7) mm, base truncate to weakly cordate, margins entire, apex obtuse or subacute; tubercles absent. <b>Achenes</b> reddish brown, 3–4 × 1.5–2 mm. <b>2n</b> = 40, 120, ca. 170, ca. 200.</span><!--

-->{{Treatment/Body
|phenology=Flowering late spring–summer.
|habitat=Moist tundra, marshes, river valleys, sandy and gravelly shores and slopes
|elevation=0-1000 m
|distribution=B.C.;N.W.T.;Nunavut;Yukon;Alaska;ne Europe;n Asia (arctic and subarctic zones).
|discussion=<p><i>Rumex arcticus</i> is polymorphic, as are R. aquaticus in the narrow sense and <i>R. occidentalis</i>. However, unlike R. aquaticus and R. occidentalus, it is represented by at least two chromosome races (G. A. Mulligan and C. Frankton 1972; Á. Löve 1986). Plants morphologically transitional between <i>R. arcticus</i> and R. aquaticus were described from Kamchatka as R. kamtschadalus (= <i>R. arcticus</i> var. kamtschadalus). The same forms occasionally occur in northwestern North America. According to Á. Löve and D. Löve (1975b) and Á. Löve (1986), they are usually tetraploids (2n = 40) and deserve recognition at the species level. However, they are not always morphologically distinct from <i>R. arcticus</i>. The group needs additional study, and at present I prefer to keep the tetraploid plants provisionally within <i>R. arcticus</i>, regarding them as var. kamtschadalus.</p><!--
--><p>A few highly sterile specimens with mostly abortive flowers, which I have seen in Alaskan herbarium material, most probably represent hybrids between tetraploid and 12-ploid races of the R. aquaticus group.</p><!--
--><p>Plants with unusually wide, triangular-oblong, or almost ovate leaves were described as var. latifolius Tolmatchew. This seems to be a predominant variety on the Beringian coast of Chukotka and Wrangel and Ratmanov islands (A. I. Tolmachew 1966). I also have seen at least two collections of this variety from the western coast of Alaska. The enigmatic var. perlatus Hultén may belong here (see discussion under 8. <i>R. lapponicus</i>).</p><!--
--><p><i>Rumex arcticus</i> has been reported from Churchill in northeastern Manitoba (H. J. Scoggan 1978–1979, part 3). That record needs confirmation because some northern forms of <i>R. arcticus</i> and <i>R. occidentalis</i> are similar.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Rumex arcticus
|authority=Trautvetter in A. T. von Middendorff
|rank=species
|parent rank=section
|synonyms=Rumex aquaticus subsp. arcticus;Rumex arcticus var. kamtschadalus;Rumex arcticus var. latifolius;Rumex domesticus var. nanus;Rumex kamtschadalus;Rumex longifolius var. nanus;Rumex ursinus
|basionyms=
|family=Polygonaceae
|phenology=Flowering late spring–summer.
|habitat=Moist tundra, marshes, river valleys, sandy and gravelly shores and slopes
|elevation=0-1000 m
|distribution=B.C.;N.W.T.;Nunavut;Yukon;Alaska;ne Europe;n Asia (arctic and subarctic zones).
|reference=None
|publication title=in A. T. von Middendorff, Reise Siber.
|publication year=1847
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V5/V5_1064.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Rumex
|subgenus=Rumex subg. Rumex
|section=Rumex sect. Rumex
|species=Rumex arcticus
}}<!--

-->[[Category:Treatment]][[Category:Rumex sect. Rumex]]