Flora of North America species comparison

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Ericameria nauseosa var. iridis

Ericameria nauseosa var. psilocarpa
Photo is of parent taxon

Rainbow Hills rabbitbrush
Photo is of parent taxon

smooth-fruit rabbitbrush
Habit Plants 10–20 cm. Plants 30–50 cm.
Stems

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

yellowish green, leafy, compactly tomentose.
Leaves

grayish green;

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

yellowish green;

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

12–16 mm.

8.5–12.2 mm.
Corollas

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

style appendages longer than stigmatic portions.

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

style appendages slightly longer than stigmatic portions.
Phyllaries

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

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

glabrous;

pappi 5.2–5.8 mm.

glabrous;

pappi 6.8–9.1 mm.
2n

= 18.

= 18.

Ericameria nauseosa var. iridis

Ericameria nauseosa var. psilocarpa
Phenology Flowering late summer. Flowering later summer–fall.
Habitat Steep slopes on ± barren, gypsiferous, Arapien shale Sagebrush and Elymus salinus communities
Elevation ca. 2000 m (ca. 6600 ft) 1900–2300 m (6200–7500 ft)
Distribution
from FNA
UT
[BONAP county map]
from FNA
UT
[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.)

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. 65. FNA vol. 20, p. 68.
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. 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
Synonyms Chrysothamnus nauseosus subsp. iridis, Chrysothamnus nauseosus var. iridis Chrysothamnus nauseosus var. psilocarpus, Chrysothamnus nauseosus subsp. psilocarpus
Name authority (L. C. Anderson) G. L. Nesom & G. I. Baird: Phytologia 75: 86. (1993) (S. F. Blake) 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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