View source for Geum rivale

{{Treatment/ID
|accepted_name=Geum rivale
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=1: 501. 1753
|year=1753
}}
|common_names=Purple or water avens;chocolate-root;benoîte des ruisseaux
|basionyms=
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Colurieae;Geum;Geum rivale
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Rosoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Colurieae]]</div><div class="higher-taxon"><small>genus</small>[[Geum]]</div><div class="higher-taxon"><small>species</small>[[Geum rivale]]</div></div>
|volume=Volume 9
|mention_page=page 60, 66, 67, 68
|treatment_page=page 65
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>leafy-stemmed. <b>Stems</b> 30–85 cm, sparsely downy to scattered-hirsute proximally, downy distally. <b>Leaves</b>: basal 6–40 cm, blade interruptedly pinnate, major leaflets 5–7, mixed with 7–14 minor ones, terminal leaflet slightly larger than major laterals; cauline 2–10 cm, stipules ± free, 7–18 × 5–9 mm, blade pinnate to 3-foliolate. <b>Inflorescences</b> 2–8-flowered. <b>Pedicels</b> densely downy, some hairs glandular. <b>Flowers</b> nodding; epicalyx bractlets 2–4 mm; hypanthium greenish maroon to maroon; sepals erect, 7–10 mm; petals erect, yellow, suffused with purple and purple-veined, spatulate-obovate, 8–10 mm, ± equal to sepals, apex rounded, truncate, or shallowly emarginate. <b>Fruiting</b> tori on 4–10 mm stipes, densely bristly. <b>Fruiting</b> styles geniculate-jointed, proximal segment persistent, 5–9 mm, apex hooked, stipitate-glandular, bristles on basal 1/2, distal segment deciduous, 3–4.5 mm, pilose except apical 1 mm. <b>2n</b> = 42.</span><!--

-->{{Treatment/Body
|phenology=Flowering mid spring–summer.
|habitat=Swamps, fens, bogs, wet meadows, along streams and lakes, moist rich woods, in circumneutral to alkaline soil
|elevation=0–3000 m
|distribution=Greenland;St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Colo.;Conn.;Idaho;Ill.;Ind.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;N.H.;N.J.;N.Mex.;N.Y.;N.Dak.;Ohio;Pa.;R.I.;S.Dak.;Vt.;Wash.;W.Va.;Wis.;Wyo.;Eurasia.
|discussion=<p><i>Geum rivale</i> forms hybrids with three other species of the genus in North America: G. ×aurantiacum Fries ex Scheutz [<i>G. aleppicum</i> × <i>G. rivale</i>] is reported from Alberta, Ontario, Montana, and New York; G. ×pervale B. Boivin [<i>G. macrophyllum </i>var.<i> perincisum</i> × <i>G. rivale</i>] is known from Alberta, Ontario, Quebec, and Saskatchewan; and G. ×pulchrum Fernald [<i>G. macrophyllum </i>var.<i> macrophyllum</i> × <i>G. rivale</i>] is reported from Ontario, Quebec, Idaho, New Hampshire, and Vermont. The hybrids generally have the habit and foliage of <i>G. rivale</i> but exhibit shallower hypanthia, spreading sepals, and pure yellow, clawed, obovate to suborbiculate petals. The glandular hairs on the pedicels usually lack the dark tips seen in <i>G. rivale</i>. Given that the morphologic differences among the three named hybrids are vague, suspected hybrid specimens are best determined while in the field where collectors can note the proximity of the hybrids to their supposed parental species.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Geum rivale
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Rosaceae
|phenology=Flowering mid spring–summer.
|habitat=Swamps, fens, bogs, wet meadows, along streams and lakes, moist rich woods, in circumneutral to alkaline soil
|elevation=0–3000 m
|distribution=Greenland;St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Colo.;Conn.;Idaho;Ill.;Ind.;Maine;Md.;Mass.;Mich.;Minn.;Mont.;N.H.;N.J.;N.Mex.;N.Y.;N.Dak.;Ohio;Pa.;R.I.;S.Dak.;Vt.;Wash.;W.Va.;Wis.;Wyo.;Eurasia.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_93.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Colurieae
|genus=Geum
|species=Geum rivale
}}<!--

-->[[Category:Treatment]][[Category:Geum]]