Bannock wild buckwheat

Eriogonum chrysocephalum A. Gray subsp. bannockense S. Stokes, Leafl. W. Bot. 3: 200. 1943; E. bannockense (S. Stokes) R. J. Davis

Plants pulvinate and cespitose, (0.3-)0.5-1.2(-1.5) × 1-2.5 dm. Aerial flowering stems erect, scapelike, 0.3-1.5 dm, tomentose. Leaves: blade narrowly oblance-olate to oblanceolate, (0.8-)1-4(-4.5) × (0.3-)0.4-0.8 cm, densely tomentose abaxially, tomentose to floccose and grayish to greenish adaxially, margins plane (rarely crenulate in Wyoming). Inflorescences capitate, 1-2 cm; branches absent. Involucres 3-6 per cluster, turbinate, 2.5-4 × 2-3 mm, floccose to tomentose. Flowers 2-3 mm; perianth yellow or, rarely, ochrocephalous, glabrous.

Flowering Jun-Sep. Sandy or shaley to gravelly flats and slopes, mixed grassland, sagebrush, and mountain mahogany communities, oak-juniper, pinyon-juniper, or montane conifer woodlands; 1800-2800 m; Idaho, Nev., Utah, Wyo.

Variety bannockense is found in widely scattered sites in southeastern Idaho (Bannock, Bear Lake, Bonneville, Cassia, and Franklin counties), northeastern Nevada (Elko County), northwestern Utah (Box Elder and northern Tooele counties) and southwestern Wyoming (Fremont, Lincoln, Sublette, and Teton counties). In habit it is similar to the more western E. desertorum, and a sharp, morphologic distinction is not always obvious between the two. Geographically the two approach each other in Box Elder County, Utah, and in Elko County, Nevada.