Eriogonum prociduum


Aliso 7: 417. 1972

Treatment appears in FNA Volume 5. Treatment on page 276. Mentioned on page 225, 230, 234, 277.

Herbs, matted, scapose, 0.3–1 × 1–3 dm, glabrous, greenish. Stems spreading, with persistent leaf bases, up to 1/5 height of plant; caudex stems matted; aerial flowering stems scapelike,weakly erect, slender, solid, not fistulose, 0.2–0.8(–0.9) dm, glabrous. Leaves basal, fasciculate in terminal tufts; petiole 0.2–1.5(–2) cm, tomentose; blade oblanceolate to spatulate or elliptic to ovate, 0.3–1.5 × 0.15–0.8 cm, densely white-tomentose on both surfaces or floccose and greenish adaxially, margins plane. Inflorescences capitate, 0.8–1.2 cm wide; branches absent; bracts 3–6, triangular, scalelike, 1–3(–4) mm. Peduncles absent. Involucres 4–7 per cluster, campanulate, 2–4 × (2.5–)3–4 mm, weakly rigid, glabrous or sparsely floccose; teeth 5–6, erect, 0.8–1.4 mm. Flowers 2–4 mm; perianth bright yellow, glabrous; tepals connate proximal 1/4–1/3, monomorphic, oblong to oblong-obovate; stamens exserted, 2.5–3.5 mm; filaments pilose proximally. Achenes light brown, 2–3.5 mm, glabrous.


Varieties 2 (2 in the flora).

Selected References



1 Leaf blades 0.3-1(-1.4) × 0.15-0.4(-0.6) cm, tomentose on both surfaces; petioles 0.2-0.5 cm; ne California, nw Nevada, and sc Oregon Eriogonum prociduum var. prociduum
1 Leaf blades 0.7-1.5 × 0.3-0.8 cm, floccose and greenish adaxially; petioles 1-1.5(-2) cm; se Oregon, sw Idaho, and nc Nevada Eriogonum prociduum var. mystrium