Flora of North America species comparison

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Ericameria nauseosa var. iridis

Ericameria nauseosa var. graveolens
Photo is of parent taxon

Rainbow Hills rabbitbrush
Photo is of parent taxon

pungent rabbitbrush
Habit Plants 10–20 cm. Plants 50–160 cm.
Stems

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

yellowish green to nearly white, leafy, compactly, smoothly tomentose.
Leaves

grayish green;

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

greenish;

blades 3-nerved, broadly linear, 30–90 × 1–3 mm, faces often tomentulose.
Involucres

12–16 mm.

6–8 mm.
Corollas

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

style appendages longer than stigmatic portions.

7–9+ mm, tubes puberulent or glabrous, lobes 0.6–1.5, glabrous;

style appendages longer than stigmatic portions.
Phyllaries

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

14–18, apices erect, acute, abaxial faces usually glabrous, outer sometimes sparsely hairy.
Cypselae

glabrous;

pappi 5.2–5.8 mm.

densely hairy;

pappi 4.9–6.5 mm.
2n

= 18.

= 18.

Ericameria nauseosa var. iridis

Ericameria nauseosa var. graveolens
Phenology Flowering late summer. Flowering late summer–fall.
Habitat Steep slopes on ± barren, gypsiferous, Arapien shale On plains in slightly alkaline soils
Elevation ca. 2000 m (ca. 6600 ft) 200–2000 m (700–6600 ft)
Distribution
from FNA
UT
[BONAP county map]
from FNA
AZ; CO; ID; KS; MT; ND; NE; NM; NV; OK; SD; TX; UT; WY; SK
[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. 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. 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. bigelovii, E. nauseosa var. ceruminosa, 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 Chrysocoma graveolens, Chrysothamnus nauseosus subsp. graveolens, Chrysothamnus nauseosus var. graveolens, E. nauseosa var. glabrata
Name authority (L. C. Anderson) G. L. Nesom & G. I. Baird: Phytologia 75: 86. (1993) (Nuttall) Reveal & Schuyler: Proc. Acad. Nat. Sci. Philadelphia 149: 20. (1999)
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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