View source for Rheum

{{Treatment/ID
|accepted_name=Rheum
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=1: 371. 1753: Gen. Pl. ed. 5, 174. 1754
|year=1754
}}
|common_names=Rhubarb
|basionyms=
|synonyms=
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Rheum
|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>[[Rheum]]</div></div>
|etymology=Greek rheon, a name used by Dioscorides, probably for a plant in this genus
|volume=Volume 5
|mention_page=page 218, 480, 489
|treatment_page=page 488
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial; roots fleshy. <b>Stems</b> erect, glabrous or pubescent. <b>Leaves</b> deciduous, mostly basal, alternate, petiolate; ocrea persistent or deciduous, chartaceous; blade cordate-ovate to orbiculate or reniform, margins entire, undulate. <b>Inflorescences</b> terminal, paniclelike, pedunculate. <b>Pedicels</b> present. <b>Flowers</b> bisexual, 1–10 per ocreate fascicle, base stipelike; perianth nonaccrescent in fruit, whitish green or pinkish green, campanulate, glabrous; tepals 6, distinct, sepaloid, dimorphic, outer 3 narrower than inner 3; stamens (6–)9; filaments distinct, free, glabrous; anthers yellow or pinkish, elliptic; styles 3, erect or deflexed, distinct; stigmas capitate. <b>Achenes</b> exserted, dark brown, winged, 3-gonous, glabrous. <b>Seeds</b>: embryo straight or curved. <b>x</b> = 11.</span><!--

-->{{Treatment/Body
|distribution=temperate regions;Eurasia.
|discussion=<p>Species ca. 60 (1 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=chin1947a
|text=Chin, T. C. and H. W. Youngken. 1947. The cytotaxonomy of Rheum. Amer. J. Bot. 34: 401–407.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Rheum
|author=Craig C. Freeman
|authority=Linnaeus
|rank=genus
|parent rank=subfamily
|synonyms=
|basionyms=
|family=Polygonaceae
|illustrator=Yevonn Wilson-Ramsey
|illustration copyright=Flora of North America Association
|distribution=temperate regions;Eurasia.
|introduced=true
|reference=chin1947a
|publication title=Sp. Pl.
|publication year=1754
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V5/V5_1018.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Rheum
}}<!--

-->[[Category:Treatment]][[Category:Polygonaceae subfam. Polygonoideae]]