Flora of North America species comparison

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Ericameria nauseosa var. psilocarpa

Ericameria nauseosa var. nauseosa
Photo is of parent taxon

smooth-fruit rabbitbrush
Photo is of parent taxon

rubber rabbitbrush
Habit Plants 30–50 cm. Plants mostly 20–60 cm.
Stems

yellowish green, leafy, compactly tomentose.

grayish to white, leafy, loosely tomentose.
Leaves

yellowish green;

blades 1-nerved, narrowly oblanceolate, 30–70 × 1–2 mm, faces glabrate.

grayish green to white;

blades 1-nerved, narrowly linear, 10–50 × 1–1.5 mm, faces loosely tomentose.
Involucres

8.5–12.2 mm.

7–10.5 mm.
Corollas

8.6–9.6 mm, tubes sparsely hairy, lobes 1.3–1.5 mm, glabrous;

style appendages slightly longer than stigmatic portions.

6.5–9 mm, tubes usually puberulent, rarely arachnose, lobes 1–2 mm, glabrous;

style appendages longer than stigmatic portions.
Phyllaries

15–18, apices erect, acute or acuminate to cuspidate, abaxial faces glabrous.

10–18, apices erect, mostly obtuse, abaxial faces tomentose, sometimes sparingly.
Cypselae

glabrous;

pappi 6.8–9.1 mm.

densely hairy;

pappi 5.2–7.2 mm.
2n

= 18.

= 18.

Ericameria nauseosa var. psilocarpa

Ericameria nauseosa var. nauseosa
Phenology Flowering later summer–fall. Flowering late summer–fall.
Habitat Sagebrush and Elymus salinus communities Plains and hills, often in barren alkaline soils
Elevation 1900–2300 m (6200–7500 ft) 300–2000 m (1000–6600 ft)
Distribution
from FNA
UT
[BONAP county map]
from FNA
CO; ID; MT; ND; NE; SD; WY; AB; SK
[BONAP county map]
Discussion

Of conservation concern.

Variety psilocarpa is apparently restricted to Carbon, Duchesne, Emery, and Wasatch counties in east-central Utah.

L. C. Anderson (1986b) excluded the name Ericameria nauseosa var. glareosa (M. E. Jones) G. L. Nesom & G. I. Baird [as Chrysothamnus nauseosus subsp. glareosus (M. E. Jones) H. M. Hall & Clements], because he had seen no herbarium or field material. Jones’s original description is sketchy; he mentioned its similarity to subsp. leiosperma. S. L. Welsh et al. (1987) noted the uncertain disposition of this taxon. A. Cronquist (1994) recognized C. nauseosus var. glareosus (M. E. Jones) H. M. Hall and placed C. nauseosus var. psilocarpus in synonymy, noting that it was equal to E. nauseosa var. glareosa (M. E. Jones) G. L. Nesom & G. I. Baird. Without more substantial documentation, use of var. psilocarpa is preferred over var. glareosa, which we take to be of uncertain application.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 68. 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. 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. nana, 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 var. psilocarpus, Chrysothamnus nauseosus subsp. psilocarpus
Name authority (S. F. Blake) G. L. Nesom & G. I. Baird: Phytologia 75: 87. (1993) unknown
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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