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

45. Eriogonum tiehmii Reveal, Great Basin Naturalist. 45: 277. 1985.

Tiehm's wild buckwheat

Herbs, matted, scapose, 1-1.5 × 0.5-3 dm, floccose, grayish. Stems spreading, with persistent leaf bases, up to 5 height of plant; caudex stems matted; aerial flowering stems scapelike, erect, slender, solid, not fistulose, (0.6-)1-1.3(-1.5) dm, floccose.  Leaves basal, fasciculate in terminal tufts; petiole 0.5-1.6(-2) cm, tomentose; blade elliptic to oblong, (0.8-)1-2.5(-3) × 0.5-0.8(-1) cm, densely white- or grayish-tomentose on both surfaces, margins plane. Inflorescences capitate, 0.9-1.4 cm wide; branches absent; bracts 3, scalelike, triangular, 1-1.5 mm. Peduncles absent. Involucres 4-8 per cluster, turbinate-campanulate, 4-5 × 3-4 mm, rigid, floccose; teeth 5-6, erect to slightly spreading, 1.5-2 mm. Flowers 2.5-3.5(-4) mm; perianth yellowish white or whitish to cream, sparsely glandular abaxially; tepals connate proximal 1/ 4, monomorphic, oblong; stamens exserted, 3-4(-4.5) mm; filaments pilose proximally. Achenes light brown, 3-4 mm, glabrous.

Flowering May-Jun. Rocky clay slopes and washes, saltbush communities; of conservation concern; 1800-1900 m; Nev.

Eriogonum tiehmii is known only from the Silver Peak Range of Esmeralda County. It is considered a “sensitive” species in Nevada.


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