Ericameria nauseosa var. iridis

(L. C. Anderson) G. L. Nesom & G. I. Baird

Phytologia 75: 86. 1993.

Common names: Rainbow Hills rabbitbrush
EndemicConservation concern
Basionym: Chrysothamnus nauseosus subsp. iridis L. C. Anderson Great Basin Naturalist 41: 311. 1981
Synonyms: Chrysothamnus nauseosus var. iridis (L. C. Anderson) S. L. Welsh
Treatment appears in FNA Volume 20. Treatment on page 65. Mentioned on page 63.

Plants 10–20 cm. Stems grayish green (at least when young), leafy, faces ± compactly tomentose. Leaves grayish green; blades 1-nerved, linear, 15–40 × 0.8–1 mm, compactly tomentose. Involucres 12–16 mm. Phyllaries 20–26, apices erect, acute to acuminate, abaxial faces glabrous. Corollas 7.8–8.7 mm, tubes glabrous, lobes 1.5–2 mm, glabrous; style appendages longer than stigmatic portions. Cypselae glabrous; pappi 5.2–5.8 mm. 2n = 18.


Phenology: Flowering late summer.
Habitat: Steep slopes on ± barren, gypsiferous, Arapien shale
Elevation: ca. 2000 m

Discussion

Of conservation concern.

Variety iridis is known only from Sevier County.

Selected References

None.

Lower Taxa

None.
Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
(L. C. Anderson) G. L. Nesom & G. I. Baird +
Chrysothamnus nauseosus subsp. iridis +
Rainbow Hills rabbitbrush +
ca. 2000 m +
Steep slopes on ± barren, gypsiferous, Arapien shale +
Flowering late summer. +
Endemic +  and Conservation concern +
Chrysothamnus nauseosus var. iridis +
Ericameria nauseosa var. iridis +
Ericameria nauseosa +
variety +