Annual or perennial herbs, subshrubs or shrubs. Stems straggling to erect, usually hairy and basally ±woody. Leaves simple, alternate, or occasionally opposite, entire or toothed to pinnatisect. Capitula radiate, terminal, solitary or in lax panicles or corymbs; involucre broadly campanulate; bracts 1–3 (–4)-seriate, membranous on margins; receptacles flat to ±convex, pitted. Ray florets female, fertile; ligules patent, yellow, white, orange, purple, pinkish-mauve or white above and purple beneath. Disc florets functionally male; anthers sagittate; style bifid. Achenes homomorphic or dimorphic, straight or slightly curved, terete or acutely or obtusely angled or winged, glabrous. [This description from Ghafoor (2015: 325–326) included several species now placed in Dimorphotheca-Editor, 3 August 2020]
Annual or perennial herbs or shrubs, not armed. Lvs usually alternate, rarely opposite, simple, entire, toothed, or pinnatisect. Capitula solitary or in loose corymbs. Involucral bracts in 1-4 rows, with membranous margins. Receptacle flat or convex; scales 0. Outer florets ♀, ligulate, yellow, white, purple, pinkish mauve, or white on upper surface and purple on lower. Inner florets tubular, functionally ♂. Achenes all similar or dimorphic, straight or curved, terete, ribbed, angled or winged; pappus 0.