View source for Eriogonum umbellatum var. dumosum

{{Treatment/ID
|accepted_name=Eriogonum umbellatum var. dumosum
|accepted_authority=(Greene) Reveal
|publications={{Treatment/Publication
|title=Harvard Pap. Bot.
|place=9: 202. 2004
|year=2004
}}
|common_names=American Valley sulphur flower
|basionyms={{Treatment/ID/Basionym
|name=Eriogonum dumosum
|authority=Greene
|publication_title=Pittonia
|publication_place=3: 199. 1897
}}
|synonyms={{Treatment/ID/Synonym
|name=Eriogonum umbellatum subsp. dumosum
|authority=(Greene) S. Stokes
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Eriogonum;Eriogonum subg. Oligogonum;Eriogonum umbellatum;Eriogonum umbellatum var. dumosum
|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>subgenus</small>[[Eriogonum subg. Oligogonum]]</div><div class="higher-taxon"><small>species</small>[[Eriogonum umbellatum]]</div><div class="higher-taxon"><small>variety</small>[[Eriogonum umbellatum var. dumosum]]</div></div>
|volume=Volume 5
|mention_page=page 338, 352
|treatment_page=page 343
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> round to erect, 3–5 × 3–10 dm. <b>Aerial</b> flowering stems erect, 0.8–2(–2.5) dm, tomentose to floccose, without one or more leaflike bracts ca. midlength. <b>Leaves</b> in loose rosettes; blade elliptic to ovate, 1–2.5(–3) × 0.5–1.2 cm, densely tomentose abaxially, thinly floccose or glabrous adaxially, margins plane. <b>Inflorescences</b> umbellate; branches 2–6(–10) cm, tomentose to floccose, without a whorl of bracts ca. midlength; involucral tubes 2–3(–5) mm, lobes 2.5–4 mm. <b>Flowers</b> 5–9 mm; perianth bright yellow.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Sep.
|habitat=Sandy to gravelly flats and slopes, mixed grassland communities, oak and conifer woodlands
|elevation=(300-)600-1200 m
|distribution=Calif.;Oreg.
|discussion=<p>Variety dumosum has been called <i></i></i>var.<i><i> polyanthum</i> in the recent California literature. It is known only from widely scattered locations, where it is localized and typically infrequent, in Amador, Placer, Plumas, Shasta, and Siskiyou counties in California, and just inside Oregon (in Jackson County). It approaches <i></i></i>var.<i><i> nevadense</i> in size but differs in having much more densely tomentose leaf blades. It can be confused also with <i></i></i>var.<i><i> modocense</i>, which is much smaller and nearly always to the east or north of <i></i></i>var.<i><i> dumosum</i>. Unlike the related <i></i></i>var.<i><i> ahartii</i>, which is always on serpentine soils, <i></i></i>var.<i><i> dumosum</i> is only occasionally found on that substrate. The American Valley sulphur flower is a largish shrub that is ideal for the garden and may well prove popular if successfully cultivated.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Eriogonum umbellatum var. dumosum
|author=
|authority=(Greene) Reveal
|rank=variety
|parent rank=species
|synonyms=Eriogonum umbellatum subsp. dumosum
|basionyms=Eriogonum dumosum
|family=Polygonaceae
|phenology=Flowering Jun–Sep.
|habitat=Sandy to gravelly flats and slopes, mixed grassland communities, oak and conifer woodlands
|elevation=(300-)600-1200 m
|distribution=Calif.;Oreg.
|reference=None
|publication title=Harvard Pap. Bot.
|publication year=2004
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V5/V5_684.xml
|subfamily=Polygonaceae subfam. Eriogonoideae
|genus=Eriogonum
|subgenus=Eriogonum subg. Oligogonum
|species=Eriogonum umbellatum
|variety=Eriogonum umbellatum var. dumosum
}}<!--

-->[[Category:Treatment]][[Category:Eriogonum umbellatum]]