Wildflowers of Southern Arizona
Aster (Asteraceae) family.
Annuals, biennials, or short-lived perennials, 2.5-8(-12, 18) cm; usually taprooted, sometimes fibrous-rooted, caudices simple or branched. Stems first erect (greenish proximally), then producing herbaceous, leafy, prostrate runners (stoloniform branches, sometimes with rooting plantlets at tips), densely hirsutulous (hairs spreading-deflexed, of relatively even lengths and orientations), sparsely minutely glandular. Leaves mostly basal (persistent in early season); blades oblanceolate to spatulate (obovate-elliptic laminae), 10-30(-60) × 3-6(-12) mm, cauline abruptly reduced distally, margins entire, dentate, or lobed, faces densely hirsute, eglandular. Heads 1(-3 rarely, from midstem or proximal branches). Involucres 3.5-4.5(-6) × 6-9(-12) mm. Phyllaries in 3-4 series, sparsely to moderately hirsute, minutely glandular. Ray florets 60-130; corollas white, often purplish abaxially, sometimes with an abaxial midstripe, 5-9 mm, laminae not coiling or reflexing. Disc corollas 2-3 mm (throats indurate and slightly inflated).
Santa Catalina Mountains
Oracle Ridge Trail
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