Opera Bot. 104: 147. 1991.
Annuals or perennials, 30–80 cm; taprooted. Stems lightly white-tomentose and/or glabrescent and green, minutely stipitate or sessile-glandular beneath other induments. Leaf-blades (not crowded, internodes mostly 5+ mm) oblanceolate-spatulate to obovate or petiolate-spatulate, 5–10 cm × 10–20 mm (distal oblong to lanceolate or oblanceolate, 2–8 cm, slightly smaller), bases not clasping and decurrent 3–20 mm or clasping and decurrent 1–3 mm or not decurrent at all, margins flat to slightly revolute, faces bicolor, abaxial thinly white-tomentose, adaxial minutely stipitate or sessile-glandular, otherwise glabrous or glabrate (bases of hairs persistent, enlarged). Heads in loose, corymbiform arrays. Involucres campanulate to turbinate, 3.5–4 mm. Phyllaries in 2–3 series, silvery white to tawny, oblong to oblong-ovate, (hyaline, shiny), glabrous. Pistillate florets 15–40 (–64). Bisexual florets (1–) 2–6. Cypselae ridged, papillate-roughened.
Phenology: Flowering (Aug–)Sep–Nov.
Habitat: Rock outcrops and slopes, crevices and thin soil on cliffs, oak or oak-pine woodlands
Elevation: 1500–2300 m
Ariz., N.Mex., Tex., Mexico (Chihuahua), Mexico (Durango), Mexico (Sonora)