Difference between revisions of "Eriogonum sphaerocephalum"

Douglas ex Bentham

Trans. Linn. Soc. London 17: 407. 1836.

IllustratedEndemic
Treatment appears in FNA Volume 5. Treatment on page 361. Mentioned on page 331, 332.
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|distribution=w United States.
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|distribution=Calif.;Idaho;Nev.;Oreg.;Wash.
 
|discussion=<p>Varieties 4 (4 in the flora).</p><!--
 
|discussion=<p>Varieties 4 (4 in the flora).</p><!--
--><p>The Piute of <i>Nevada</i> have used a decoction of the root of <i>Eriogonum sphaerocephalum</i> (either <i></i></i>var.<i><i> sphaerocephalum</i> or var. halimoides) to treat colds and diarrhea (P. Train et al. 1941).</p>
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--><p>The Piute of <i>Nevada</i> have used a decoction of the root of <i>Eriogonum sphaerocephalum</i> (either <i></i>var.<i> sphaerocephalum</i> or var. halimoides) to treat colds and diarrhea (P. Train et al. 1941).</p>
 
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name=Eriogonum sphaerocephalum
 
name=Eriogonum sphaerocephalum
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|authority=Douglas ex Bentham
 
|authority=Douglas ex Bentham
 
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|family=Polygonaceae
 
|family=Polygonaceae
|distribution=w United States.
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|distribution=Calif.;Idaho;Nev.;Oreg.;Wash.
 
|reference=None
 
|reference=None
 
|publication title=Trans. Linn. Soc. London
 
|publication title=Trans. Linn. Soc. London
 
|publication year=1836
 
|publication year=1836
|special status=
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|special status=Illustrated;Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V5/V5_736.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_736.xml
 
|subfamily=Polygonaceae subfam. Eriogonoideae
 
|subfamily=Polygonaceae subfam. Eriogonoideae
 
|genus=Eriogonum
 
|genus=Eriogonum
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Latest revision as of 17:06, 6 November 2020

Subshrubs, spreading to erect, infrequently polygamodioecious, 0.5–4 × 3–5(–6) dm, floccose or glabrous. Stems: caudex spreading; aerial flowering stems erect, slender, solid, not fistulose, arising at nodes of caudex branches and at distal nodes of short, non-flowering aerial branches, (0.3–)0.5–1 dm, thinly floccose or glabrous, with a whorl of 4–8 leaflike bracts ca. midlength or proximally, linear-oblanceolate to oblanceolate, 1–2 × 0.1–0.4 cm. Leaves in loose to congested basal rosettes; petiole 0.05–0.3 cm, floccose or glabrous; blade linear-oblanceolate, narrowly oblanceolate, or narrowly spatulate, 1–3(–4) × (0.1–)0.3–0.6(–1) cm, lanate or tomentose to floccose or glabrous, margins entire, plane or revolute. Inflorescences capitate, compound-umbellate, or umbellate, 1–2 cm wide or 1–5 × 1–5 cm; branches thinly floccose or glabrous; bracts absent immediately below involucre. Involucres 1 per node, turbinate-campanulate to campanulate, 3–4 × 2.5–4.5 mm; teeth 6–10, lobelike, slightly reflexed, 1.5–3(–5) mm. Flowers (5–)6–9 mm, including 1–2 mm stipelike base; perianth pale to bright yellow or cream to ochroleucous, villous abaxially; tepals monomorphic, obovate to oblong-ovate; stamens exserted, 4–6 mm; filaments pilose proximally. Achenes light brown, 3–4 mm, glabrous except for sparsely pubescent beak.

Distribution

V5 736-distribution-map.gif

Calif., Idaho, Nev., Oreg., Wash.

Discussion

Varieties 4 (4 in the flora).

The Piute of Nevada have used a decoction of the root of Eriogonum sphaerocephalum (either var. sphaerocephalum or var. halimoides) to treat colds and diarrhea (P. Train et al. 1941).

Selected References

None.

Key

1 Perianths bright yellow; inflorescences umbellate or compound-umbellate; ne California, sw Idaho, n and wc Nevada, e Oregon, and e Washington Eriogonum sphaerocephalum var. sphaerocephalum
1 Perianths pale yellow to cream or ochroleucous; inflorescences umbellate, compound-umbellate, or capitate; ne California, sw or wc Idaho, c Oregon, and c Washington > 2
2 Leaf blades usually thinly floccose or glabrous on both surfaces; inflorescences umbellate or compound-umbellate; sw Idaho Eriogonum sphaerocephalum var. fasciculifolium
2 Leaf blades tomentose on both surfaces, or floccose adaxially; inflorescence capitate or umbellate; ne California to nw Nevada, c Oregon to wc Idaho, and c Washington. [3. Shifted to left margin.—Ed.] > 3
3 Leaf blades usually narrowly oblanceolate to narrowly spatulate, margins plane; ne California to nw Nevada, c Oregon to wc Idaho, and c Washington Eriogonum sphaerocephalum var. halimioides
3 Leaf blades linear-oblanceolate, margins usually revolute; nc Oregon, sc Washington Eriogonum sphaerocephalum var. sublineare