Flora of North America species comparison

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Ericameria parryi var. monocephala

Ericameria parryi var. howardii
Photo is of parent taxon

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

Howard's rabbitbrush, Parry's rabbitbrush
Habit Plants 5–40 cm (rigid). Plants 30–60 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.

crowded, gray;

blades 1-nerved, linear, 20–40 × ca. 1 mm, faces tomentose, eglandular;

distalmost overtopping arrays.
Involucres

10–11 mm.

9.5–12 mm.
Florets

5–7;

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

5–7;

corollas pale yellow, 8–10.7 mm, tubes hairy, throats gradually dilated, lobes 1.2–1.7 mm.
Phyllaries

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

12–20, mostly chartaceous, apices spreading, acuminate.
Heads

1–2(–4) at branch tips.

5–10+ in compact, racemiform arrays, or terminal glomerules.
2n

= 18.

= 18.

Ericameria parryi var. monocephala

Ericameria parryi var. howardii
Phenology Flowering late summer–fall. Flowering late summer–fall.
Habitat Open subalpine forests, talus, and alpine barrens Upland slopes, tablelands
Elevation 2800–3700 m (9200–12100 ft) 200–2900 m (700–9500 ft)
Distribution
from FNA
CA; NV
[BONAP county map]
from FNA
AZ; CO; NE; NM; UT; WY
[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.)

Variety howardii grows within and east of the Rocky Mountains.

(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. attenuata, 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 Linosyris howardii, Chrysothamnus parryi subsp. howardii
Name authority (A. Nelson & P. B. Kennedy) G. L. Nesom & G. I. Baird: Phytologia 75: 89. (1993) (Parry ex A. Gray) 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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