Description. Plants herbs, erect, scapose, (0.7) 1–4.5 (5) dm tall, 0.5–1.5 dm across; stems spreading, without persistent leaf bases, up to 1/5 height of plant, the caudex stems slightly matted, the aerial flowering stems erect, slender, solid, not fistulose, (0.6) 1–4 (5) dm long, glabrous or slightly floccose; leaves basal, 1 per node, the petioles (0.5) 1–3 cm long, tomentose, the blades lanceolate to elliptic or oblong, (0.6) 1–3.5 (4) cm long, (0.3) 0.5–1.5 cm wide, densely white-tomentose on both surfaces, the margins plane; inflorescences capitate, 1.5–2.5 cm long, the branches absent, the bracts 3, scalelike, narrowly triangular, 1–2.5 mm long; peduncles absent or erect, slender, 0.1–0.5 (0.6) cm long, glabrous; involucres solitary on a peduncle or 2–5 (8) per cluster, narrowly turbinate to turbinate, 3–5.5 mm long, (1.5) 2–3 (4) mm wide, rigid, sparsely floccose or glabrous, the teeth 6–8, erect, 0.5–1 mm long; flowers 1.5–3 mm long, the perianth pale to bright yellow, glabrous, the hypanthium only at base of perianth, the tepals monomorphic, broadly oblong, the stamens exserted, 2.5–3.5 (4) mm long, the filaments pilose proximally; achenes light brown, 1.5–3 mm long, glabrous.
- Involucres sparsely floccose over the length of the tube, sessile or nearly so; scapes (0.7) 1–3 dm long; leaf blades (0.6) 1–1.5 cm wide; Baker and Malheur cos., Oregon, and southern Canyon Co., Idaho. Eriogonum calcareum var. calcareum
- Involucres sparsely floccose over the upper half of the tube, rarely glabrous, pedunculate; scapes 2–4.5 (5) dm long; leaf blades (0.3) 0.5–1 cm wide; southwestern Idaho in Elmore, Owyhee, Payette, Twin Falls, and southern Washington cos. Eriogonum calcareum var. sceptrum.
Recent Researches. Donald H. Mansfield and Brittni J. Brown – both from the Department of Biology / College of Idaho – have published an article, in January 2017, titled “Edaphic and Geographic Origins of Varietal Differentiation In Eriogonum calcareum”.
All the pictures of Eriogonum calcareum var. calcareum were taken 1.5 mi from Durkee along Burnt River Road in Oregon on July 4 th 2017. 44°35’7″ N 117°30’14” W.