Wildflowers of Southern Arizona
Aster (Asteraceae) family.
Perennials, 30-80(-100) cm; rhizomatous, fibrous-rooted, caudices relatively thick. Stems erect, glabrous or sparsely hirsuto-pilose (hairs 0.5-1 mm), often minutely glandular distally. Leaves basal (usually withering by flowering) and cauline; basal blades oblanceolate-spatulate, 30-80(-150) × 4-18(-28) mm, margins entire, often ciliate (main veins sometimes also), faces glabrous, eglandular or distal sparsely minutely glandular; cauline blades ovate to ovate-lanceolate, oblong-lanceolate, or lanceolate, nearly even-sized distally or sometimes mid largest (continuing to immediately below heads, bases usually clasping to subclasping). Heads (2-)4-20 in corymbiform arrays. Involucres 6-9 × 11-22 mm. Phyllaries in 2-3(-4) series, usually glabrous, sometimes sparsely hirsuto-pilose, minutely glandular. Ray florets 75-150; corollas blue to lavender, rarely whitish, 8-16 mm (mostly 1 mm wide), laminae slightly coiling at least at tips. Disc corollas 4-5 mm.
Santa Catalina Mountains
Oracle Ridge Trail
7/30/15 & 9/13/15
See SEINet Pictures and Description