Flora of North America species comparison

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Ericameria parryi var. monocephala

Ericameria parryi var. attenuata
Photo is of parent taxon

one-head rabbitbrush, Parry's rabbitbrush
Photo is of parent taxon

narrow-bract rabbitbrush, Parry's rabbitbrush
Habit Plants 5–40 cm (rigid). Plants 20–60 cm.
Leaves

crowded, grayish;

blades mostly 1-nerved, linear, 10–30 × 0.5–1.5 mm, faces sparsely to densely tomentulose, viscidulous;

distalmost overtopping arrays.

moderately crowded, green;

blades 1-nerved, linear, 20–40 × ca. 1 mm, faces glabrous or sparsely hairy, eglandular, somewhat viscid;

distalmost shorter than arrays.
Involucres

10–11 mm.

11–12.5 mm.
Florets

5–7;

corollas 8–9 mm, tubes sparsely strigose, throats gradually dilated, lobes 1.5–1.8 mm.

5–7;

corollas clear yellow, 10–11 mm, tubes glabrous, throats gradually dilated, lobes 1.5–2 mm.
Phyllaries

8–12, thinly chartaceous, apices erect to spreading, attenuate.

13–22, apices erect, attenuate.
Heads

1–2(–4) at branch tips.

5–10 in compact, racemiform arrays.
2n

= 18.

= 18.

Ericameria parryi var. monocephala

Ericameria parryi var. attenuata
Phenology Flowering late summer–fall. Flowering late summer–fall.
Habitat Open subalpine forests, talus, and alpine barrens Mountain slopes, dry, stony soils, sagebrush, pinyon-juniper, ponderosa pine, and aspen communities
Elevation 2800–3700 m (9200–12100 ft) 1700–3000 m (5600–9800 ft)
Distribution
from FNA
CA; NV
[BONAP county map]
from FNA
CO; NM; UT
[BONAP county map]
Discussion

Of conservation concern.

Variety monocephala is known from the Sierra Nevada.

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

S. L. Welsh et al. (1987) noted that characteristics used to distinguish var. howardii from var. attenuata (distalmost leaves overtopping arrays and pale-colored florets) fail as diagnostic features for plants from Utah.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 74. FNA vol. 20, p. 73.
Parent taxa Asteraceae > tribe Astereae > Ericameria > Ericameria parryi Asteraceae > tribe Astereae > Ericameria > Ericameria parryi
Sibling taxa
E. parryi var. affinis, E. parryi var. aspera, E. parryi var. attenuata, E. parryi var. howardii, E. parryi var. imula, E. parryi var. latior, E. parryi var. montana, E. parryi var. nevadensis, E. parryi var. parryi, E. parryi var. salmonensis, E. parryi var. vulcanica
E. parryi var. affinis, E. parryi var. aspera, E. parryi var. howardii, E. parryi var. imula, E. parryi var. latior, E. parryi var. monocephala, E. parryi var. montana, E. parryi var. nevadensis, E. parryi var. parryi, E. parryi var. salmonensis, E. parryi var. vulcanica
Synonyms Chrysothamnus monocephalus, Chrysothamnus parryi subsp. monocephalus Bigelowia howardii var. attenuata, Chrysothamnus parryi subsp. attenuatus
Name authority (A. Nelson & P. B. Kennedy) G. L. Nesom & G. I. Baird: Phytologia 75: 89. (1993) (M. E. Jones) G. L. Nesom & G. I. Baird: Phytologia 75: 88. (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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