Ericameria arizonica R. P. Roberts, Urbatsch & J. Anderson
Family: Asteraceae
Ericameria arizonica image
Arizona State University Herbarium  
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. Flowering fall. Rock faces, cracks, and crevices and stony soils, usually on limestone; of conservation concern; ca. 2100 m; Ariz. Ericameria arizonica grows in the Grand Canyon.

Ericameria arizonica image
Daniela Roth  
Ericameria arizonica image
Daniela Roth  
Ericameria arizonica image
Daniela Roth  
Ericameria arizonica image
Arizona State University Herbarium  
The National Science Foundation
This project made possible by National Science Foundation Award 1410069