Ericameria nauseosa var. speciosa

(Nuttall) G. L. Nesom & G. I. Baird

Phytologia 75: 87. 1993.

Endemic
Basionym: Chrysothamnus speciosus Nuttall Trans. Amer. Philos. Soc., n. s. 7: 323. 1840
Synonyms: Chrysothamnus nauseosus subsp. albicaulis (Nuttall) H. M. Hall & Clements Chrysothamnus nauseosus subsp. speciosus (Nuttall) H. M. Hall & Clements
Treatment appears in FNA Volume 20. Mentioned on page 64, 68.

Plants 40–200 cm (shorter in some alpine forms). Stems whitish, leafy, loosely tomentose. Leaves dark green to grayish white; blades 1-nerved, linear to linear-oblanceolate, 30–70 × 0.3–1.5(–2.5) mm, faces usually loosely, rarely compactly, tomentose. Involucres 7.5–13.5 mm. Phyllaries 12–28, apices erect, acute, abaxial faces tomentose (especially outer), sometimes sparsely. Corollas 8.7–13 mm, tubes tomentose or glabrous, lobes 1.1–2.1 mm, glabrous; style appendages longer than stigmatic portions. Cypselae densely hairy; pappi 6–11.3 mm.


Phenology: Flowering late summer–fall.
Habitat: Dry habitats, including juniper-sage, yellow pine, and pinyon communities
Elevation: 50–3500 m

Distribution

V20-118-distribution-map.gif

Alta., B.C., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Variety speciosa intergrades with vars. hololeuca and oreophila. Stabilized hybrids with Ericameria discoidea occur in Mono County, California.

Selected References

None.

Lower Taxa

None.
Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
(Nuttall) G. L. Nesom & G. I. Baird +
Chrysothamnus speciosus +
Alta. +, B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
50–3500 m +
Dry habitats, including juniper-sage, yellow pine, and pinyon communities +
Flowering late summer–fall. +
Chrysothamnus nauseosus subsp. albicaulis +  and Chrysothamnus nauseosus subsp. speciosus +
Ericameria nauseosa var. speciosa +
Ericameria nauseosa +
variety +