View source for Eriogonum flavum

{{Treatment/ID
|accepted_name=Eriogonum flavum
|accepted_authority=Nuttall
|publications={{Treatment/Publication
|title=Cat. Pl. Upper Louisiana, no.
|place=34. 1813
|year=1813
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Eriogonum flavum var. polyphyllum
|authority=(Small ex Rydberg) M. E. Jones
|rank=variety
}} {{Treatment/ID/Synonym
|name=Eriogonum polyphyllum
|authority=
|rank=species
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Eriogonum;Eriogonum flavum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polygonaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Polygonaceae subfam. Eriogonoideae]]</div><div class="higher-taxon"><small>genus</small>[[Eriogonum]]</div><div class="higher-taxon"><small>species</small>[[Eriogonum flavum]]</div></div>
|volume=Volume 5
|mention_page=page 333, 369, 373
|treatment_page=page 371
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> matted, 0.2–4 × 1–10 dm, tomentose to floccose. <b>Stems</b>: caudex absent or spreading; aerial flowering stems erect or nearly so, slender, solid, not fistulose, arising at nodes of caudex branches and at distal nodes of short, nonflowering aerial branches, (0.1–)0.5–2(–3) dm, tomentose to floccose. <b>Leaves</b> basal, occasionally in rosettes; petiole 0.5–4 cm, tomentose to floccose; blade linear-oblanceolate to oblong or elliptic, 1–7(–9) × (0.3–)0.5–1.5 cm, densely whitish- or grayish-tomentose abaxially, mostly tomentose to floccose or glabrous and green adaxially, margins entire, plane. <b>Inflorescences</b> subcapitate or umbellate, 0.5–3(–5) × 0.3–2.5(–3) dm; branches tomentose to floccose; bracts 4–6, leaflike to semileaflike at proximal node, 0.5–2 × 0.2–0.5 cm, sometimes absent immediately below involucre. <b>Involucres</b> 1 per node, turbinate to campanulate, 3–9 × 2–5 mm, tomentose to floccose; teeth 5–8, erect, 0.2–1 mm. <b>Flowers</b> 3–7 mm, including 0.2–1.5 mm stipelike base; perianth pale to bright yellow, densely pubescent abaxially; tepals monomorphic, oblong; stamens exserted, 3–6 mm; filaments pilose proximally. <b>Achenes</b> light brown to brown, 3–5 mm, glabrous except for sparsely pubescent beak.</span><!--

-->{{Treatment/Body
|distribution=Alta.;B.C.;Man.;Sask.;Yukon;Alaska;Colo.;Idaho;Mont.;N.Dak.;Nebr.;Oreg.;S.Dak.;Wash.;Wyo.
|discussion=<p>Varieties 3 (3 in the flora).</p><!--
--><p><i>Eriogonum flavum</i> approaches <i>E. arcuatum</i> morphologically in southeastern Wyoming, and a clear distinction is not always possible when the plants are immature or the herbarium material is poor.</p><!--
--><p>Variety polyphyllum, as traditionally circumscribed, is an alpine phase of both <i></i>var.<i> flavum</i> and <i></i>var.<i> piperi</i>; it is encountered infrequently in scattered range in the high mountains of southwestern Montana and northwestern Wyoming.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Stipelike bases of flowers 1-1.5 mm; usually w of Continental Divide; sw Alberta and British Columbia, n Idaho, w Montana, ne Oregon, e Washington, nw Wyoming
|[[Eriogonum flavum var. piperi|Eriogonum flavum var. piperi]]
|-id=key-0-1
|1
|Stipelike bases of flowers 0.2-1 mm; usually e of Continental Divide; ec Alaska, s Alberta, sw Manitoba, s Saskatchewan, wc Yukon, Montana, w Nebraska, North Dakota, South Dakota, e Wyoming, and Colorado
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Leaf blades (0.3-)1-1.5 cm wide; inflorescence branches 4-20 cm; s Alberta, sw Manitoba, s Saskatchewan, Montana, w Nebraska, North Dakota, South Dakota, e Wyoming, and Colorado
|[[Eriogonum flavum var. flavum|Eriogonum flavum var. flavum]]
|-id=key-0-2
|2
|Leaf blades 0.4-1 cm wide; inflorescence branches 0.5-2 cm; ec Alaska, wc Yukon
|[[Eriogonum flavum var. aquilinum|Eriogonum flavum var. aquilinum]]
|}
</div></div><!--

-->{{#Taxon:
name=Eriogonum flavum
|authority=Nuttall
|rank=species
|parent rank=genus
|synonyms=Eriogonum flavum var. polyphyllum;Eriogonum polyphyllum
|basionyms=
|family=Polygonaceae
|distribution=Alta.;B.C.;Man.;Sask.;Yukon;Alaska;Colo.;Idaho;Mont.;N.Dak.;Nebr.;Oreg.;S.Dak.;Wash.;Wyo.
|reference=None
|publication title=Cat. Pl. Upper Louisiana, no.
|publication year=1813
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_764.xml
|subfamily=Polygonaceae subfam. Eriogonoideae
|genus=Eriogonum
|species=Eriogonum flavum
}}<!--

-->

[[Category:Treatment]]
[[Category:Eriogonum]]
[[Category:Revised Since Print]]