Ericameria nauseosa var. oreophila

(A. Nelson) G. L. Nesom & G. I. Baird

Phytologia 78: 64. 1995.

Common names: Great Basin rabbitbrush
Basionym: Chrysothamnus oreophilus A. Nelson Bot. Gaz. 28: 375. 1900
Synonyms: Chrysothamnus nauseosus var. artus (A. Nelson) Cronquist Chrysothamnus nauseosus subsp. consimilis (Greene) H. M. Hall & Clements Chrysothamnus nauseosus var. consimilis (Greene) H. M. Hall Chrysothamnus oreophilus var. artus A. Nelson Ericameria nauseosa var. arta (A. Nelson) G. L. Nesom & G. I. Baird Ericameria nauseosa subsp. consimilis (Greene) G. L. Nesom & G. I. Baird
Treatment appears in FNA Volume 20. Treatment on page 67. Mentioned on page 62, 63, 64, 66, 68.

Plants 70–250 cm. Stems greenish, usually leafy, compactly tomentose. Leaves yellowish green; blades 1-nerved, filiform to linear, 20–50 × 0.8–1 mm, faces glabrate. Involucres 6.5–10 mm. Phyllaries 11–20, apices erect, acute, glabrous. Corollas 6–9 mm, tubes glabrous, lobes 1.5–2.5 mm, glabrous; style appendages shorter than or equaling stigmatic portions. Cypselae hairy (sometimes glabrous in Idaho populations); pappi 4.2–7.6 mm. 2n = 18 (as Chrysothamnus nauseosus subsp. consimilis).

Phenology: Flowering late summer–fall.
Habitat: Alkaline valleys and plains
Elevation: 1200–3000 m



Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wyo., Mexico (Baja California).


The names Chrysothamnus nauseosus subsp. consimilis and var. consimilis (Ericameria nauseosa subsp. consimilis) have been used for this taxon; an equivalent combination has not been made at the varietal level in Ericameria. Variety oreophila intergrades with vars. mohavensis and speciosa.

Selected References


Lower Taxa

Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
(A. Nelson) G. L. Nesom & G. I. Baird +
Chrysothamnus oreophilus +
Great Basin rabbitbrush +
Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wyo. +  and Mexico (Baja California). +
1200–3000 m +
Alkaline valleys and plains +
Flowering late summer–fall. +
Chrysothamnus nauseosus var. artus +, Chrysothamnus nauseosus subsp. consimilis +, Chrysothamnus nauseosus var. consimilis +, Chrysothamnus oreophilus var. artus +, Ericameria nauseosa var. arta +  and Ericameria nauseosa subsp. consimilis +
Ericameria nauseosa var. oreophila +
Ericameria nauseosa +
variety +