Flora of North America species comparison

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Ericameria nauseosa var. iridis

Ericameria nauseosa var. nana
Photo is of parent taxon

Rainbow Hills rabbitbrush
Photo is of parent taxon

dwarf rabbitbrush, little rabbitbrush
Habit Plants 10–20 cm. Plants 10–30 cm.
Stems

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

whitish, leafy, loosely tomentose.
Leaves

grayish green;

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

dark green to grayish;

blades 1-nerved, filiform to linear, 30–40 × 1–3 mm, faces compactly tomentose.
Involucres

12–16 mm.

8–13 mm.
Corollas

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

style appendages longer than stigmatic portions.

7.5–10 mm, tubes glabrous or moderately hairy, lobes 1.6–2.5 mm, glabrous;

style appendages shorter than stigmatic portions.
Phyllaries

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

14–18, apices erect, acute to obtuse, outer abaxial faces sparsely tomentose, inner glabrous.
Cypselae

glabrous;

pappi 5.2–5.8 mm.

densely hairy;

pappi 5.2–9 mm.
2n

= 18.

= 18.

Ericameria nauseosa var. iridis

Ericameria nauseosa var. nana
Phenology Flowering late summer. Flowering late summer–fall.
Habitat Steep slopes on ± barren, gypsiferous, Arapien shale Dry, rocky ridges and cliffs
Elevation ca. 2000 m (ca. 6600 ft) 1200–2000 m (3900–6600 ft)
Distribution
from FNA
UT
[BONAP county map]
from FNA
ID; OR; WA
[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. 67.
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. 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. 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 Chrysothamnus nauseosus var. nanus, Chrysothamnus nauseosus subsp. nanus
Name authority (L. C. Anderson) G. L. Nesom & G. I. Baird: Phytologia 75: 86. (1993) (Cronquist) G. L. Nesom & G. I. Baird: Phytologia 75: 87. (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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