Eriogonum rosense var. rosense

Common names: Mt. Rose wild buckwheat
Endemic
Synonyms: Eriogonum ochrocephalum var. agnellum Eriogonum ochrocephalum subsp. agnellum (Jepson) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 279. Mentioned on page 280.

Plants 0.2–1 × 0.5–1.5(–2) dm. Leaf blades oblanceolate to elliptic, 0.4–1.5(–1.7) × (0.15–)0.25–0.6(–1) cm, densely white-tomentose and glandular on both surfaces. Involucres turbinate to turbinate-campanulate, (2.5–)3–4(–4.5) × 2.5–3.5 mm; teeth (5–)6–8. Flowers 2–3 mm; perianth bright yellow to reddish yellow; tepals obovate. Achenes 1.5–2.5 mm. 2n = 40.


Phenology: Flowering Jul–Sep.
Habitat: Granitic or volcanic slopes and ridges, sagebrush communities, montane to alpine conifer woodlands
Elevation: (2300-)2500-4000 m

Discussion

Variety rosense is common in the Sierra Nevada (Alpine, Amador, El Dorado, Fresno, Inyo, Madera, Mono, Nevada, Placer, Shasta, Sierra, and Tuolumne counties) and higher desert ranges to the east in Carson City, Douglas, Esmeralda, Storey, and Washoe counties, Nevada. It is an excellent rock-garden plant.

Selected References

None.

Lower Taxa

None.
James L. Reveal +
A. Nelson & P. B. Kennedy +
Undefined subg. Eucycla +
Mt. Rose wild buckwheat +
Calif. +  and Nev. +
(2300-)2500-4000 m +
Granitic or volcanic slopes and ridges, sagebrush communities, montane to alpine conifer woodlands +
Flowering Jul–Sep. +
Proc. Biol. Soc. Wash. +
Eriogonum ochrocephalum var. agnellum +  and Eriogonum ochrocephalum subsp. agnellum +
Eriogonum rosense var. rosense +
Eriogonum rosense +
variety +