Erect perennial herb, spreading by underground rhizomes, to 50 cm high; stems glaucous. Leaves sessile, linear, 20–50 mm long, 3–10 mm wide, glaucous; margins entire to shallowly serrate and undulate with sparse coarse white hairs (lamina otherwise glabrous); upper leaves mostly opposite. Capitula terminal, solitary or in groups of 3 or 4, 1–1.5 cm diam. (excluding rays), to 3–4.5 cm diam. (including rays), erect, on short glabrous peduncles; involucral bracts ovate to oblong, obtuse, ciliate, otherwise ±glabrous; paleae entire to erose at tip, weakly striate. Ray florets yellow; ligules c. 1 cm long, or sometimes lacking. Disc florets numerous, yellow with reddish purple lobes. Achenes obovate to subcuneate, weakly angled, c. 2.5–3 mm long, black or greyish at maturity, glabrous. Pappus of 2 early-caducous ovate scales.
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