Eriogonum collinum

S. Stokes ex M. E. Jones

Contr. W. Bot. 11: 15. 1903.

Common names: Juniper wild buckwheat
Endemic
Treatment appears in FNA Volume 5. Treatment on page 406. Mentioned on page 384.

Herbs, erect or spreading, annual, 1–5(–7) dm, glabrous or infrequently slightly floccose, greenish, grayish, or reddish. Stems: caudex absent; aerial flowering stems erect, solid, not fistulose, 0.3–1 dm, glabrous, infrequently slightly floccose proximally. Leaves basal; petiole 1–5 cm, floccose; blade elliptic to obovate or orbiculate, (0.5–)1–2.5(–3) × (0.5–)1–3 (3.5) cm, tomentose to hirsute abaxially, floccose or glabrous and greenish adaxially, margins plane. Inflorescences cymose to cymose-paniculate or racemose, open, 5–60 × 5–45 cm; branches glabrous; bracts 3, scalelike, 1–2(–4) × 1–2 mm. Peduncles ascending, curving, slender, 1–5 cm, glabrous. Involucres turbinate, (1.5–)2–3 × (1–)1.5–2.5 mm, glabrous; teeth 5, erect, 0.5–1 mm. Flowers 1–2.5 mm; perianth white to pale yellow, glabrous, pustulose proximally; tepals monomorphic, lanceolate to spatulate or ovate; stamens included, 1–1.8 mm; filaments glabrous. Achenes brown, lenticular, 2–2.5 mm, glabrous. 2n = 36.


Phenology: Flowering May–Nov.
Habitat: Sandy to clayey or gravelly washes, flats, and slopes, saltbush, greasewood, sagebrush, and mountain mahogany communities, pinyon and/or juniper woodlands
Elevation: 1300-2000 m

Discussion

Eriogonum collinum is infrequent to locally common in the Lahontan Basin region of the Intermountain West in northeastern California (Lassen and Modoc counties), south-central Oregon (Lake County), and northwestern Nevada (Douglas, Humboldt, Lyon, Pershing, Storey, and Washoe counties).

Selected References

None.

Lower Taxa

None.
... more about "Eriogonum collinum"
James L. Reveal +
S. Stokes ex M. E. Jones +
Eriogonum sect. Ganysma +
Juniper wild buckwheat +
Calif. +, Nev. +  and Oreg. +
1300-2000 m +
Sandy to clayey or gravelly washes, flats, and slopes, saltbush, greasewood, sagebrush, and mountain mahogany communities, pinyon and/or juniper woodlands +
Flowering May–Nov. +
Contr. W. Bot. +
Eriogonum collinum +
Eriogonum subg. Ganysma +
species +