All Floras      Advanced Search
FNA Vol. 5 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 5 | Polygonaceae | Eriogonum

191. Eriogonum spergulinum A. Gray, Proc. Amer. Acad. Arts. 7: 389. 1868.

Oxytheca spergulina (A. Gray) Greene

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.

Varieties 3 (3 in the flora): w United States.

1 Branch internodes not glandular; plants prostrate to ascending; s Sierra Nevada, California   191c var. pratense
+ Branch internodes glandular; plants erect   (2)
2 (1) 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   191a var. reddingianum
+ Flowers 2.5-3.5 mm; c Sierra Nevada, California   191b var. spergulinum


Related Objects  
  • Distribution Map
  • Map

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |