Flora of North America species comparison

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Ericameria nauseosa var. speciosa

Ericameria nauseosa var. hololeuca
Photo is of parent taxon

common rabbit-bush, rubber rabbitbrush, showy common rabbit-brush, showy rabbitbrush
Photo is of parent taxon

common rabbitbrush, white rabbitbrush
Habit Plants 40–200 cm (shorter in some alpine forms). Plants 40–120 cm (pleasantly fragrant).
Stems

whitish, leafy, loosely tomentose.

whitish, leafy, densely to loosely tomentose.
Leaves

dark green to grayish white;

blades 1-nerved, linear to linear-oblanceolate, 30–70 × 0.3–1.5(–2.5) mm, faces usually loosely, rarely compactly, tomentose.

whitish;

blades 1-nerved, filiform to linear, 10–35 × 1–2 mm, faces tomentose.
Involucres

7.5–13.5 mm.

7–9 mm.
Corollas

8.7–13 mm, tubes tomentose or glabrous, lobes 1.1–2.1 mm, glabrous;

style appendages longer than stigmatic portions.

7–9.5 mm, tubes puberulent to cobwebby, lobes 0.5–1 mm, glabrous;

style appendages shorter than stigmatic portions.
Cypselae

densely hairy;

pappi 6–11.3 mm.

densely hairy;

pappi 5.2–7.2 mm.
Phyllarie(s)

12–28, apices erect, acute, abaxial faces tomentose (especially outer), sometimes sparsely.

14–16, apices erect, obtuse, abaxial faces tomentose.
2n

= 18.

Ericameria nauseosa var. speciosa

Ericameria nauseosa var. hololeuca
Phenology Flowering late summer–fall. Flowering late summer–fall.
Habitat Dry habitats, including juniper-sage, yellow pine, and pinyon communities Well-drained, gravelly or sandy slopes
Elevation 50–3500 m (200–11500 ft) 100–2500 m (300–8200 ft)
Distribution
from FNA
CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC
[BONAP county map]
from FNA
AZ; CA; ID; NM; NV; OR; UT
[BONAP county map]
Discussion

Variety speciosa intergrades with vars. hololeuca and oreophila. Stabilized hybrids with Ericameria discoidea occur in Mono County, California.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20. 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. 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. 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. 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 speciosus, Chrysothamnus nauseosus subsp. albicaulis, Chrysothamnus nauseosus subsp. speciosus Bigelowia graveolens var. hololeuca, Chrysothamnus nauseosus var. hololeucus
Name authority (Nuttall) G. L. Nesom & G. I. Baird: Phytologia 75: 87. (1993) (A. Gray) G. L. Nesom & G. I. Baird: Phytologia 75: 86. (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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