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Photo is of parent taxon

Bigelow's rabbitbrush

Photo is of parent taxon

Rainbow Hills rabbitbrush

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

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
from FNA
AZ; CO; NM; UT
[BONAP county map]
from FNA
UT
[BONAP county map]
Discussion

Of conservation concern.

Variety iridis is known only from Sevier County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 20, p. 64. FNA vol. 20, p. 65.
Parent taxa Asteraceae > tribe Astereae > Ericameria > Ericameria nauseosa Asteraceae > tribe Astereae > Ericameria > Ericameria nauseosa
Sibling taxa
E. nauseosa var. arenaria, E. nauseosa var. bernardina, E. nauseosa var. ceruminosa, E. nauseosa var. graveolens, E. nauseosa var. hololeuca, E. nauseosa var. iridis, E. nauseosa var. juncea, E. nauseosa var. latisquamea, E. nauseosa var. leiosperma, E. nauseosa var. mohavensis, E. nauseosa var. nana, E. nauseosa var. nauseosa, E. nauseosa var. nitida, E. nauseosa var. oreophila, E. nauseosa var. psilocarpa, E. nauseosa var. salicifolia, E. nauseosa var. speciosa, E. nauseosa var. texensis, E. nauseosa var. turbinata, E. nauseosa var. washoensis
E. nauseosa var. arenaria, E. nauseosa var. bernardina, E. nauseosa var. bigelovii, E. nauseosa var. ceruminosa, E. nauseosa var. graveolens, E. nauseosa var. hololeuca, E. nauseosa var. juncea, E. nauseosa var. latisquamea, E. nauseosa var. leiosperma, E. nauseosa var. mohavensis, E. nauseosa var. nana, E. nauseosa var. nauseosa, E. nauseosa var. nitida, E. nauseosa var. oreophila, E. nauseosa var. psilocarpa, E. nauseosa var. salicifolia, E. nauseosa var. speciosa, E. nauseosa var. texensis, E. nauseosa var. turbinata, E. nauseosa var. washoensis
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)
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