Wildflowers of Southern Arizona
Aster (Asteraceae) family.
Annuals, 10-50(-100) cm. Leaf blades: bases ± clasping, faces usually sparsely and finely tomentose (hairs coarse, erect, multicellular) and stipitate- or sessile-glandular; proximal spatulate to oblong, 20-50+ × 5-15 mm, usually entire, sometimes 2-6-lobed or -toothed distally; distal narrowly oblong to linear, 10-20 × 1-5 mm, mostly entire. Heads borne in (narrowly cylindric) racemiform-paniculiform arrays (proximal in axils of distal leaves). Involucres 4-6 mm. Receptacles 3-4 mm diam. Pistillate florets 60-100+; corollas: ± equaling or surpassing styles, laminae 0.5-1+ mm. Disc florets 5-8+. Cypselae reddish brown, 1-1.5 mm, glabrous or sparsely strigillose (hairs 0.05-0.1 mm), sometimes glandular near apices; pappi ± persistent, of 12-20 white to tawny bristles in 1 series, 3.5-4 mm. Flowering late summer-early fall. Sandy roadsides, stream banks, openings in pine forests; 2000-2900 m.
Santa Catalina Mountains
Location: Incinerator Ridge Trail.
See SEINet Pictures and Description