Leafl. W. Bot. 3: 175. 1942.
Herbs, forming upright columnar clumps 3–5 dm diam., glabrous or densely pubescent. Stems 3–6 dm. Leaves strongly ascending; petioles of proximal leaves 0.3–0.5 cm; blades of midstem leaves ovate to narrowly ovate, 3.5–6 × 2–3 cm, base acute to rounded, symmetric, apex acute. Involucres: peduncle 6–10 mm; involucres pendent, 12–21 mm; bracts 5, 50% connate, apex acute to widely ovate. Flowers 6 per involucre; perianth usually creamy white, 1.2–1.5 cm. Fruits dark-brown, with 10 slender, tan ribs occasionally evident at base, ellipsoid, 7–8 mm, smooth, glabrous, not secreting mucilage when wetted. 2n = 66.
Phenology: Flowering mid spring–early summer.
Habitat: Calcareous hills and flats in arid brushlands
Elevation: 1000-1500 m
"broader" is not a number."narrower" is not a number."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.