Eriogonum alatum var. glabriusculum

Torrey

in War Department [U.S.], Pacif. Railr. Rep. 4(5): 131. 1857.

Common names: Canadian River wild buckwheat
Endemic
Treatment appears in FNA Volume 5. Treatment on page 380. Mentioned on page 379.

Plants 10–20(–25) dm. Aerial flowering stems glabrous or nearly so. Leaves basal and cauline; basal: petiole 2–5, strigose, blade linear-lanceolate to lanceolate, 8–20 × 0.5–1.5 cm, slightly strigose or glabrous adaxially, glabrous abaxially except for strigose margins and midveins; cauline: blade 1–9 cm. Inflorescences 2–6.5 dm; branches glabrous. Peduncles glabrous or occasionally slightly strigose. Involucres glabrous. Perianths yellow to yellowish green or maroon. Achenes 5.5–9 × 3–5.5 mm. 2n = 40.


Phenology: Flowering Jul–Oct.
Habitat: Sandy to gravelly flats and gentle slopes, mixed grassland, saltbush, and mesquite communities, oak woodlands
Elevation: 300-1400 m

Discussion

Variety glabriusculum is a distinctive taxon of the southern Great Plains, often being the tallest plants on the low, rolling hills. It is geographically isolated from var. alatum, being found near Ruth in Curry County, New Mexico, in western Oklahoma, and in northern Texas.

Selected References

None.

Lower Taxa

None.
James L. Reveal +
Torrey +
Undefined subg. Pterogonum +
Canadian River wild buckwheat +
N.Mex. +, Okla. +  and Tex. +
300-1400 m +
Sandy to gravelly flats and gentle slopes, mixed grassland, saltbush, and mesquite communities, oak woodlands +
Flowering Jul–Oct. +
in War Department [U.S.], Pacif. Railr. Rep. +
Pterogonum alatum +
Eriogonum alatum var. glabriusculum +
Eriogonum alatum +
variety +