Flora of North America species comparison

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Ericameria nauseosa var. texensis

Ericameria nauseosa var. speciosa
Photo is of parent taxon

Texas rabbitbrush
Photo is of parent taxon

common rabbit-bush, rubber rabbitbrush, showy common rabbit-brush, showy rabbitbrush
Habit Plants 20–40(–50) cm. Plants 40–200 cm (shorter in some alpine forms).
Stems

whitish, leafy, loosely tomentose.

whitish, leafy, loosely tomentose.
Leaves

grayish green;

blades 1-nerved, linear, 10–35 × 1(–1.5) mm, faces loosely tomentulose.

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.
Involucres

8–11.5 mm.

7.5–13.5 mm.
Corollas

8.4–10.9 mm, tubes glabrous or sparsely puberulent, lobes 0.6–1.3 mm, glabrous;

style appendages shorter than stigmatic portions.

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

style appendages longer than stigmatic portions.
Phyllaries

16–23 (outer margins ciliate), apices erect, acute to obtuse (outer) to acuminate (inner), outer abaxial faces tomentose, glabrescent.

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

glabrous;

pappi 5.2–7.4 mm.

densely hairy;

pappi 6–11.3 mm.
2n

= 18.

Ericameria nauseosa var. texensis

Ericameria nauseosa var. speciosa
Phenology Flowering fall. Flowering late summer–fall.
Habitat Limestone cliffs and among boulders, less common on gravel alluvium of streambeds, associated with bigtooth maple, hornbeam, madrone, and yellow pine woodlands Dry habitats, including juniper-sage, yellow pine, and pinyon communities
Elevation 1500–2100 m (4900–6900 ft) 50–3500 m (200–11500 ft)
Distribution
from FNA
NM; TX
[BONAP county map]
from FNA
CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC
[BONAP county map]
Discussion

Of conservation concern.

Variety texensis is known from the Guadalupe Mountains.

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

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, p. 69. FNA vol. 20.
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. speciosa, 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. 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
Synonyms Chrysothamnus nauseosus subsp. texensis Chrysothamnus speciosus, Chrysothamnus nauseosus subsp. albicaulis, Chrysothamnus nauseosus subsp. speciosus
Name authority (L. C. Anderson) G. L. Nesom & G. I. Baird: Phytologia 75: 88. (1993) (Nuttall) 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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