Eriogonum douglasii |
Eriogonum douglasii var. meridionale |
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Douglas' buckwheat, Douglas' wild buckwheat |
Douglas' buckwheat, southern buckwheat, southern wild buckwheat |
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Habit | Herbs, matted, occasionally polygamodioecious, 0.4–1.5 × 0.5–6 dm, thinly tomentose to glabrate. | |||||||||
Stems | caudex 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, 0.4–1.2 dm, with a whorl of 4–8 leaflike bracts ca. midlength, similar to leaf blades, 0.3–1.5 × 0.1–0.3 cm. |
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Leaves | in basal rosettes; petiole 0.05–0.5(–1) cm, tomentose; blade oblanceolate or elliptic to spatulate, 0.4–1.5(–1.9) × 0.1–0.5 cm, lanate on both surfaces, or tomentose abaxially and slightly less so and greenish adaxially, margins entire, plane. |
blades broadly elliptic to spatulate, densely grayish-lanate on both surfaces. |
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Inflorescences | capitate, 0.8–1.5 cm wide; branches absent; bracts absent immediately below involucre. |
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Involucres | 1 per node, turbinate to turbinate-campanulate, 2.5–3.5 × 2–2.5 mm; teeth 6–14, lobelike, strongly reflexed, 1.5–4(–6) mm. |
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Flowers | 4–9 mm, including 0.7–2 mm stipelike base; perianth yellow, cream, or ochroleucous to rose-red, sparsely to densely villous abaxially; tepals monomorphic, obovate; stamens exserted, 4–6 mm; filaments pilose proximally. |
4–5(–6) mm; perianth yellow or ochroleucous to rose-red, densely villous. |
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Achenes | light brown, 3–4.5 mm, glabrous except for pubescent beak. |
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Eriogonum douglasii |
Eriogonum douglasii var. meridionale |
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Phenology | Flowering Apr–Jun. | |||||||||
Habitat | Sandy to gravelly or rocky flats and slopes, manzanita and sagebrush communities, oak and montane conifer woodlands | |||||||||
Elevation | 1300-2500(-2900) m (4300-8200(-9500) ft) | |||||||||
Distribution |
CA; NV; OR; WA
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CA; NV; OR |
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety meridionale is found infrequently in five widely scattered areas. The northernmost is along the Jackson County, Oregon, and Siskiyou County, California, border. In the latter county, the variety is found also in the Marble Mountains area. It is seen occasionally in and near the Warner Mountains of Lake County, Oregon, and Modoc County, California. The plants are much more common along the eastern slope of the northern Sierra Nevada in Lassen County, Nevada, Plumas and Sierra counties, California, and in the Reno area of Washoe County, Nevada. The last and most restricted population is in the Intermountain Region near Pyramid Lake in Washoe County. Variety meridionale occasionally is seen in cultivation and is an ideal addition to any rock garden. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 363. | FNA vol. 5, p. 363. | ||||||||
Parent taxa | Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oligogonum | Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oligogonum > Eriogonum douglasii | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | E. caespitosum subsp. douglasii | |||||||||
Name authority | Bentham: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 9. (1856) | Reveal: Phytologia 86: 130. (2004) | ||||||||
Web links |