Ericameria nauseosa var. bigelovii |
Ericameria nauseosa var. iridis |
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Bigelow's rabbitbrush |
Rainbow Hills rabbitbrush |
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Habit | Plants 15–120 cm. | Plants 10–20 cm. |
Stems | whitish, nearly leafless at flowering, loosely tomentose. |
grayish green (at least when young), leafy, faces ± compactly tomentose. |
Leaves | mostly grayish white; blades 1-nerved, filiform, 15–30 × 0.5–1 mm, faces tomentulose. |
grayish green; blades 1-nerved, linear, 15–40 × 0.8–1 mm, compactly tomentose. |
Involucres | 10.5–12.5 mm. |
12–16 mm. |
Corollas | 9–11 mm, tubes glabrous or puberulent, lobes 0.8–1.5 mm, glabrous; style appendages longer than stigmatic portions. |
7.8–8.7 mm, tubes glabrous, lobes 1.5–2 mm, glabrous; style appendages longer than stigmatic portions. |
Phyllaries | 14–18(–25), apices erect, acute to acuminate, abaxial faces tomentulose. |
20–26, apices erect, acute to acuminate, abaxial faces glabrous. |
Cypselae | glabrous; pappi 7.2–11 mm. |
glabrous; pappi 5.2–5.8 mm. |
2n | = 18. |
= 18. |
Ericameria nauseosa var. bigelovii |
Ericameria nauseosa var. iridis |
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Phenology | Flowering late summer–fall. | Flowering late summer. |
Habitat | Dry slopes and mesas | Steep slopes on ± barren, gypsiferous, Arapien shale |
Elevation | 1300–2200 m (4300–7200 ft) | ca. 2000 m (ca. 6600 ft) |
Distribution |
AZ; CO; NM; UT |
UT |
Discussion | Of conservation concern. Variety iridis is known only from Sevier County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 20, p. 64. | FNA vol. 20, p. 65. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Linosyris bigelovii, Chrysothamnus nauseosus subsp. bigelovii | Chrysothamnus nauseosus subsp. iridis, Chrysothamnus nauseosus var. iridis |
Name authority | (A. Gray) G. L. Nesom & G. I. Baird: Phytologia 75: 85. (1993) | (L. C. Anderson) G. L. Nesom & G. I. Baird: Phytologia 75: 86. (1993) |
Web links |