Flora of North America species comparison

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Ericameria nauseosa var. iridis

Ericameria nauseosa var. bigelovii
Photo is of parent taxon

Rainbow Hills rabbitbrush
Photo is of parent taxon

Bigelow's rabbitbrush
Habit Plants 10–20 cm. Plants 15–120 cm.
Stems

grayish green (at least when young), leafy, faces ± compactly tomentose.

whitish, nearly leafless at flowering, loosely tomentose.
Leaves

grayish green;

blades 1-nerved, linear, 15–40 × 0.8–1 mm, compactly tomentose.

mostly grayish white;

blades 1-nerved, filiform, 15–30 × 0.5–1 mm, faces tomentulose.
Involucres

12–16 mm.

10.5–12.5 mm.
Corollas

7.8–8.7 mm, tubes glabrous, lobes 1.5–2 mm, glabrous;

style appendages longer than stigmatic portions.

9–11 mm, tubes glabrous or puberulent, lobes 0.8–1.5 mm, glabrous;

style appendages longer than stigmatic portions.
Phyllaries

20–26, apices erect, acute to acuminate, abaxial faces glabrous.

14–18(–25), apices erect, acute to acuminate, abaxial faces tomentulose.
Cypselae

glabrous;

pappi 5.2–5.8 mm.

glabrous;

pappi 7.2–11 mm.
2n

= 18.

= 18.

Ericameria nauseosa var. iridis

Ericameria nauseosa var. bigelovii
Phenology Flowering late summer. Flowering late summer–fall.
Habitat Steep slopes on ± barren, gypsiferous, Arapien shale Dry slopes and mesas
Elevation ca. 2000 m (ca. 6600 ft) 1300–2200 m (4300–7200 ft)
Distribution
from FNA
UT
[BONAP county map]
from FNA
AZ; CO; NM; 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. 65. FNA vol. 20, p. 64.
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. 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
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
Synonyms Chrysothamnus nauseosus subsp. iridis, Chrysothamnus nauseosus var. iridis Linosyris bigelovii, Chrysothamnus nauseosus subsp. bigelovii
Name authority (L. C. Anderson) G. L. Nesom & G. I. Baird: Phytologia 75: 86. (1993) (A. Gray) G. L. Nesom & G. I. Baird: Phytologia 75: 85. (1993)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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