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

16b. Eriogonum corymbosum Bentham var. revealianum (S. L. Welsh) Reveal, Great Basin Naturalist. 35: 362. 1976.

Bicknell wild buckwheat

Eriogonum revealianum S. L. Welsh, Great Basin Naturalist 30: 17, fig. 2. 1970

Subshrubs, 3-6 × 2-7 dm. Leaves cauline 4 or less length of flowering stem; petiole 0.5-1(-1.5) cm; blade lanceolate to oblanceolate, 2-4.5 × 0.3-1 cm, densely tomentose abaxially, less so and greenish adaxially. Inflorescences 8-20 cm; branches floccose. Involucres 1.5-3.5 × 1-2 mm. Flowers 2-3.5 mm; perianth white to cream, glabrous.

Flowering Jul-Sep. Gravelly to rocky clay slopes, sagebrush communities, pinyon-juniper and conifer woodlands; 2100-2800 m; Utah.

Variety revealianum is known only from Utah (mainly Garfield, northern Kane, Piute and Sanpete counties), where it is encountered only infrequently. Elsewhere it is found in widely scattered disjunct populations on Bromley Ridge in the La Sal Mountains in northern San Juan County, and near the abandoned townsite of Rainbow in southeastern Uintah County. It is only marginally distinct from var. corymbosum. Some populations of E. lonchophyllum closely resemble var. revealianum, but that species always has glabrous inflorescences where such confusion might occur.


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