Fish Creek fleabane
Annuals, 15-40 cm; taprooted. Stems (multiple) procumbent or ascending-decumbent, sparsely and evenly hirsute to hispido-pilose, minutely and densely stipitate-glandular. Leaves basal and cauline (proximal largest); blades obovate, 10-22 × 2-7 mm, slightly reduced distally, margins entire or rarely 1-toothed, faces sparsely pilose, minutely glandular. Heads 1-4 (per stem). Involucres 2.8-3.4 × 4-6 mm. Phyllaries in 2-3 series, hispido-pilose, minutely glandular. Ray florets 45-58; corollas 3-3.7 mm, laminae not coiling or reflexing, white, often drying blue. Disc corollas 1.5-1.8 mm (throats indurate and inflated). Cypselae 0.8-1 mm, 2-nerved, faces sparsely strigose to glabrate; pappi: outer of setae, inner of 8-11 bristles. Flowering May-Jul(-Oct) (perhaps both earlier and later after rain). Gravelly and sandy washes; of conservation concern; 700-1200 m; Ariz.
This project made possible by National Science Foundation Award 1410069