Rock fleabane

Perennials, 0.5–3.5 cm (mat-forming); taprooted (taproots weakly developed, often not evident), caudices with system of relatively slender, basal offsets and slender, woody rhizomes (1–15 cm). Stems (bases greenish) decumbent to ascending (flowering erect, scapiform), sparsely strigose, eglandular. Leaves basal (persistent); blades (bases greenish) spatulate (often folding), 5–12 × 1–3.5 mm, margins entire, faces glabrous or sparsely strigose, eglandular. Heads 1. Involucres 4–4.5 × 4–7 mm. Phyllaries in 3–4(–5) series (erect, apices appressed), glabrous or sparsely strigose, sometimes minutely glandular. Ray florets 10–20; corollas white, 5.5–9 mm, laminae reflexing. Disc corollas 2.8–3.8 mm (throats slightly indurate and inflated). Cypselae 1.5–1.8 mm, 2(–3)-nerved, faces sparsely strigose; pappi: outer of setae, inner of 13–18 bristles. 2n = 18.

Flowering May–Jun(–Jul). Crevices and soil pockets of porphyritic or rhyolitic cliffs; 2000–2900 m; Ariz., N.Mex.