Ericameria arizonica R. P. Roberts, Urbatsch & J. L. Anderson

Ericameria arizonica grows in the Grand Canyon.

Plants 20–50 cm. Stems erect to spreading, reddish tan, becoming darker, branched, short-stipitate-glandular, usually resinous. Leaves ascending to spreading; blades elliptic to narrowly oblanceolate (flat or somewhat concave adaxially), 10–35 × 2–5 mm, midnerves evident (often with 1–2 fainter, collateral veins), apices acute, apiculate, faces short-stipitate - glandular, usually gland-dotted; axillary fascicles absent. Heads in cymiform arrays (to 4 cm wide). Peduncles 1–10 mm (bracts 1–5, resembling phyllaries, stipitate-glandular). Involucres obconic, 5.5–7.5 × 2.5–4 mm. Phyllaries 30–40 in 4–5 series, tan, lanceolate to elliptic, 2–7 × 0.5–1.2 mm, strongly unequal, mostly chartaceous (bodies abruptly constricted at bases of appendages), midnerves faint, (margins membranous, sparsely ciliate apically), apices (usually recurved) usually acute to cuspidate, sometimes long-acuminate, abaxial faces glabrate, often gland-dotted. Ray florets 1–8; laminae elliptic, 3–4 × 0.8–1.3 mm. Disc florets 5–15; corollas 5–7 mm. Cypselae usually tan, sometimes reddish, narrowly obconic, 4–5.5 mm, glabrous or densely sericeous; pappi whitish tan, 4–5.5 mm.

Ericameria arizonica is a North American species of flowering shrub in the family Asteraceae known as Arizona goldenbush or Grand Canyon goldenweed. It has been found only on the cliffs on the south rim of the Grand Canyon in Coconino County, Arizona.

Ericameria arizonica is a shrub up to 50 cm (20 inches) tall. It has elliptic to narrowly oblanceolate leaves up to 35 mm (1.4 inches) long. Flower heads are in flat-topped arrays, each with both disc florets and ray florets.

Ericameria arizonica là một loài thực vật có hoa trong họ Cúc. Loài này được R.P.Roberts, Urbatsch & J.Anderson mô tả khoa học đầu tiên năm 2005.