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FNA | Family List | FNA Vol. 5 | Polygonaceae | Eriogonum

158. Eriogonum aliquantum Reveal, Phytologia. 34: 460. 1976.

Cimarron wild buckwheat

Herbs, erect to spreading, annual, 1.5-3.5 dm, sparsely villous, grayish. Stems: caudex absent; aerial flowering stems erect, solid, not fistulose, 0.3-0.7 dm, sparsely villous. Leaves basal and cauline; basal: petiole 1.5-2.5 cm, sparsely villous, blade elliptic to broadly elliptic, 1.5-2 × 1-1.5 cm, glabrous and green on both surfaces, margins entire, villous; cauline: petiole 0.5-1 cm, sparsely villous, blade elliptic, 0.5-1.5 × 0.2-1 cm, similar to basal blade. Inflorescences cymose, open, 15-25 × 15-25 cm; branches not fistulose, sparsely villous; bracts 3, scalelike, 1-4 × 1-3 mm. Peduncles absent or rarely 1 at proximal node, erect, straight, slender, 0.3-0.7 cm, villous. Involucres turbinate-campanulate, 1-1.3 × 1-1.2 mm; teeth 5, erect, 0.4-0.6 mm. Flowers 1.2-2 mm, glabrous; perianth yellowish with darker yellowish brown to reddish brown midribs, glabrous; tepals monomorphic, oblanceolate; stamens exserted, 1.3-1.5 mm; filaments glabrous. Achenes shiny light brown to brown, 3-gonous, 1.7-2.3 mm, glabrous.

Flowering Jun-Aug. Clayey flats, saltbush and sagebrush communities, montane conifer woodlands; 1900-2100 m; N.Mex.

Eriogonum aliquantum is known only from the Cimarron, Vermejo, and Canadian river basins in Colfax County. Morphologically it is similar to E. visheri from the northern Great Plains, and a clear distinction is not always possible. Although considered a candidate for federal protection since the late 1970s, E. aliquantum remains essentially forgotten.


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