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Compilation
Eriogonum siskiyouense

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Isotype of Eriogonum siskiyouense Small [family POLYGONACEAE]
Isotype of Eriogonum siskiyouense Small [family POLYGONACEAE]
Isotype of Eriogonum siskiyouense Small [family POLYGONACEAE]
Isotype of Eriogonum siskiyouense Small [family POLYGONACEAE]
Isotype of Eriogonum siskiyouense Small [family POLYGONACEAE]
Holotype of Eriogonum siskiyouense Small [family POLYGONACEAE]
Type of Eriogonum alpinum Engelm. [family POLYGONACEAE]
Isotype of Eriogonum siskiyouense Small [family POLYGONACEAE]
Isotype of Eriogonum siskiyouense Small [family POLYGONACEAE]
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Name

Identification
Isotype of Eriogonum siskiyouense Small [family POLYGONACEAE ] (stored under name); Verified by Not on sheet,
Related name
  • Eriogonum siskiyouense
  • Eriogonum umbellatum
Common name
  • Siskiyou wild buckwheat, Flora of North America Vol. 5

Flora

Entry for Eriogonum siskiyouense Small [family POLYGONACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 5,
Names
Eriogonum siskiyouense Small [family POLYGONACEAE], Bull. Torrey Bot. Club, 25: 44. 1898
Eriogonum ursinum S. Watson var. siskiyouense (Small) S. Stokes [family POLYGONACEAE]
Past names
siskiyouensis
Treatment Author(s)
James L. Reveal
Information
Herbs, spreading, matted, 0.5–2 × 1–5 dm, glabrate 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, 0.5–1.5(–2) dm, usually glabrous, with a whorl of 2–4 leaflike bracts ca. midlength, similar to leaf blade, 0.3–0.5 × 0.1–0.2 cm. Leaves in dense compact basal rosettes; petiole 0.2–0.6 cm, glabrate or glabrous; blade spatulate to round, (0.3–)0.5–0.8 × (0.2–)0.3–0.5(–0.7) cm, densely white to thinly tomentose abaxially, sparsely floccose to glabrate and green or olive green adaxially, rarely glabrous on both surfaces, margins entire, plane. Inflorescences capitate, rarely umbellate, 0.8–1.5 cm wide or 1–2 × 1–3 cm; branches usually glabrate; bracts absent immediately below involucre. Involucres 1 per node, turbinate-campanulate to campanulate, (3–)3.5–4 × 4–6 mm, arachnoid-tomentose; teeth 6–10, lobelike, reflexed, (2–)2.5–3.5 mm. Flowers (4–)4.5–6 mm, including 0.6–1 mm stipelike base; perianth sulphur yellow, glabrous; tepals monomorphic, oblong; stamens exserted, 3.5–5 mm; filaments pilose proximally. Achenes light brown, 4.5–5 mm, glabrous.
Phenology
jul-aug (summer), sep (fall)
Altitude range
1600–2800 m;
Distribution
USA Calif.
Discussion
Eriogonum siskiyouense is restricted to the ridge system that extends from the Scott Mountain area to the Mt. Eddy region of Siskiyou and Trinity counties. The vast majority of individuals in a population have a single involucre atop each flowering stem, but at lower elevations and in somewhat more protected sites the inflorescence may be umbellate. The Siskiyou wild buckwheat does well in cultivation if its soil requirements are fulfilled.

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