Ericameria paniculata

(A. Gray) Rydberg

Fl. Rocky Mts., 1066. 1917.

Common names: Mojave or punctate rabbitbrush
Basionym: Bigelowia paniculata A. Gray Proc. Amer. Acad. Arts 8: 644. 1873 (as Bigelovia)
Synonyms: Chrysothamnus paniculatus (A. Gray) H. M. Hall
Treatment appears in FNA Volume 20. Treatment on page 71. Mentioned on page 53.

Plants 50–200 cm. Stems erect to spreading, green when young, often black-banded or splotched (from fungal infections), fastigiately branched, glabrous, gland-dotted, resinous. Leaves mostly ascending; blades filiform (adaxially sulcate), 10–35 × 0.5–1.5 mm, midnerves obscure, apices apiculate, faces glabrous, gland-dotted (in circular, deep pits), resinous; axillary fascicles usually absent. Heads in paniculiform arrays (5–50 mm wide). Peduncles 2–12 mm (bracts 0–10, leaflike). Involucres subcylindric, 5.5–9 × 3.5–7 mm. Phyllaries 13–20 in 3–5 series, tan, lanceolate to elliptic, 1–5 × 0.5–1.7 mm, unequal, mostly chartaceous, membranous, midnerves not or slightly raised, faint on distal 1/2, (margins entire, sometimes ciliate distally) apices erect, acute to rounded, apiculate, abaxial faces glabrous, ± resinous. Ray florets 0. Disc florets 5–8; corollas 5–7 mm. Cypselae tan to brown, narrowly elliptic to oblanceoloid, 3.5–4.5 mm (ribs ca. 5), sericeous; pappi off-white to brown, 5.5–6.5 mm. 2n = 18.

Phenology: Flowering late summer–fall.
Habitat: Stony open deserts and washes
Elevation: 400–1600 m



Ariz., Calif., Nev., Utah.


Selected References


Lower Taxa

... more about "Ericameria paniculata"
Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
(A. Gray) Rydberg +
Bigelowia paniculata +
Mojave or punctate rabbitbrush +
Ariz. +, Calif. +, Nev. +  and Utah. +
400–1600 m +
Stony open deserts and washes +
Flowering late summer–fall. +
Fl. Rocky Mts., +
Chrysothamnus paniculatus +
Ericameria paniculata +
Ericameria +
species +