View source for Rumex britannica

{{Treatment/ID
|accepted_name=Rumex britannica
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=1: 334. 1753
|year=1753
}}
|common_names=Greater water or British dock
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Rumex britannica var. borealis
|authority=Rechinger f.
|rank=variety
}} {{Treatment/ID/Synonym
|name=Rumex hydrolapathum var. americanum
|authority=A. Gray
|rank=variety
}} {{Treatment/ID/Synonym
|name=Rumex orbiculatus
|authority=
|rank=species
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Rumex;Rumex subg. Rumex;Rumex sect. Rumex;Rumex britannica
|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 britannica]]</div></div>
|volume=Volume 5
|mention_page=page 496, 508
|treatment_page=page 524
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial, normally glabrous or very indistinctly papillose on veins of leaf blades abaxially, with fusiform, vertical rootstock. <b>Stems</b> erect, branched distal to middle, 80–150(–200) cm. <b>Leaves</b>: ocrea deciduous or partially persistent at maturity; blade lanceolate or oblong-lanceolate, normally 20–55(–70) × 2–7 cm, base cuneate, occasionally rounded or truncate, margins entire, flat to slightly crisped, apex acute. <b>Inflorescences</b> terminal, occupying distal 1/2 of stem, dense or interrupted in proximal 1/2, broadly paniculate, branches usually straight or arcuate. <b>Pedicels</b> articulated in proximal 1/3, filiform, 5–13 mm, articulation barely evident, not distinctly swollen. <b>Flowers</b> 15–25 in whorls; inner tepals orbiculate or orbiculate-ovate, rarely ovate-deltoid, 4–7(–7.5) × 3.5–7 mm, base truncate or slightly cordate, margins entire or weakly erose, flat, apex obtuse to subacute; tubercles 3, equal or subequal, normally less than 2 times as wide as inner tepals. <b>Achenes</b> usually reddish brown, 3–4.5 × 1.5–2.5 mm. <b>2n</b> = 20.</span><!--

-->{{Treatment/Body
|phenology=Flowering late spring–summer.
|habitat=Marshes, shores, wet meadows, other damp areas
|elevation=0-1500 m
|distribution=Alta.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Calif.;Conn.;D.C.;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Nebr.;N.H.;N.J.;N.Y.;N.Dak.;Pa.;R.I.;S.Dak.;Vt.;Va.;Wis.
|discussion=<p>The name <i>Rumex</i> orbiculatus commonly was applied to this North American species. After study of the Linnaean type of <i>R. britannica</i>, J. E. Dawson (1979) concluded that that name is the earliest valid one for this taxon.</p><!--
--><p>In early North American floristic literature, <i>Rumex britannica</i> commonly was misidentified as R. hydrolapathum Hudson, a closely related European species also belonging to subsect. Hydrolapatha Rechinger f. (K. H. Rechinger 1937); that species differs from <i>R. britannica</i> in having more triangular inner tepals with an acute apex. The name R. acutus Linnaeus was misapplied to <i>R. britannica</i> by W. J. Hooker ([1829–] 1833–1840, vol. 2) and other botanists.</p><!--
--><p>Disjunct populations have been reported from California and Louisiana. The California record (from Plumas County) was confirmed by J. E. Dawson (1979); the records from Louisiana need confirmation.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Rumex britannica
|authority=Linnaeus
|rank=species
|parent rank=section
|synonyms=Rumex britannica var. borealis;Rumex hydrolapathum var. americanum;Rumex orbiculatus
|basionyms=
|family=Polygonaceae
|phenology=Flowering late spring–summer.
|habitat=Marshes, shores, wet meadows, other damp areas
|elevation=0-1500 m
|distribution=Alta.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Calif.;Conn.;D.C.;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Nebr.;N.H.;N.J.;N.Y.;N.Dak.;Pa.;R.I.;S.Dak.;Vt.;Va.;Wis.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_1074.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Rumex
|subgenus=Rumex subg. Rumex
|section=Rumex sect. Rumex
|species=Rumex britannica
}}<!--

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