Eriogonum spergulinum
Proc. Amer. Acad. Arts 7: 389. 1868.
Herbs, prostrate to spreading or erect, annual, 0.5–4 dm, glabrous or glandular and short-hispid, greenish, grayish, or reddish. Stems: caudex absent; aerial flowering stems prostrate to erect, solid, not fistulose, 0.1–0.5 dm, glabrous or glandular and short-hispid. Leaves basal and cauline; basal: petiole 0.05–0.3 cm, hispid, blade linear, (0.3–)1–3(–4) × 0.05–0.3 cm, short-hispid, margins plane or revolute, ciliate; cauline sessile, blade linear, 0.3–2.5 × 0.05–0.3 cm, similar to basal blade. Inflorescences cymose, open to diffuse, 4–25 × 5–35 cm; branches sparsely hispid to puberulent, internodes usually glandular; bracts 3–6, semileaflike, 2–10 × 0.5–2 mm. Peduncles erect, straight, filiform, 0.4–1.5 cm, glabrous. Involucres turbinate, 0.5–1 × 0.4–0.8 mm, glabrous; teeth 4, erect, 0.2–0.4 mm. Flowers 1.5–3.5 mm; perianth white with greenish to reddish midribs, becoming pinkish to rose, glabrous or sparsely pubescent; tepals monomorphic, oblong; stamens included, 0.5–2 mm; filaments usually glabrous. Achenes brown to blackish, lenticular, 1.5–2.3 mm, glabrous.
Distribution
Calif., Idaho, Nev., Oreg.
Discussion
Varieties 3 (3 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Branch internodes not glandular; plants prostrate to ascending; s Sierra Nevada, California | Eriogonum spergulinum var. pratense |
| 1 | Branch internodes glandular; plants erect | > 2 |
| 2 | Flowers 1.5-2.5 mm; Transverse, Sierra Nevada, and North Coast Ranges of nw, sw, and e California and w Nevada, also s Oregon, c Idaho | Eriogonum spergulinum var. reddingianum |
| 2 | Flowers 2.5-3.5 mm; c Sierra Nevada, California | Eriogonum spergulinum var. spergulinum |