Flora of North America species comparison

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Ericameria nauseosa var. texensis

Ericameria nauseosa var. oreophila
Photo is of parent taxon

Texas rabbitbrush
Photo is of parent taxon

Great Basin rabbitbrush, rubber rabbitbrush
Habit Plants 20–40(–50) cm. Plants 70–250 cm.
Stems

whitish, leafy, loosely tomentose.

greenish, usually leafy, compactly tomentose.
Leaves

grayish green;

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

yellowish green;

blades 1-nerved, filiform to linear, 20–50 × 0.8–1 mm, faces glabrate.
Involucres

8–11.5 mm.

6.5–10 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.

6–9 mm, tubes glabrous, lobes 1.5–2.5 mm, glabrous;

style appendages shorter than or equaling stigmatic portions.
Phyllaries

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

11–20, apices erect, acute, glabrous.
Cypselae

glabrous;

pappi 5.2–7.4 mm.

hairy (sometimes glabrous in Idaho populations);

pappi 4.2–7.6 mm.
2n

= 18.

= 18 (as Chrysothamnus nauseosus subsp. consimilis).

Ericameria nauseosa var. texensis

Ericameria nauseosa var. oreophila
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 Alkaline valleys and plains
Elevation 1500–2100 m (4900–6900 ft) 1200–3000 m (3900–9800 ft)
Distribution
from FNA
NM; TX
[BONAP county map]
from FNA
AZ; CA; CO; ID; MT; NM; NV; OR; UT; WY; Mexico (Baja California)
[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.)

The names Chrysothamnus nauseosus subsp. consimilis and var. consimilis (Ericameria nauseosa subsp. consimilis) have been used for this taxon; an equivalent combination has not been made at the varietal level in Ericameria. Variety oreophila intergrades with vars. mohavensis and speciosa.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 69. 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. 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. 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. texensis Chrysothamnus oreophilus, Chrysothamnus nauseosus var. artus, Chrysothamnus nauseosus subsp. consimilis, Chrysothamnus nauseosus var. consimilis, Chrysothamnus oreophilus var. artus, E. nauseosa var. arta, E. nauseosa subsp. consimilis
Name authority (L. C. Anderson) G. L. Nesom & G. I. Baird: Phytologia 75: 88. (1993) (A. Nelson) G. L. Nesom & G. I. Baird: Phytologia 78: 64. (1995)
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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