General: Annual herb from a fibrous root; stems branched, appressed-hairy with some long, spreading hairs and sometimes some glandular hairs, 15-60 cm tall.
Flowers: Heads with ray and disk flowers, numerous in leafy-bracted clusters, the bases sparsely hairy; involucres 2-3 mm tall; involucral bracts egg-shaped; receptacles conic, covered with narrow, membranous scales; ray flowers white, about 1 mm long; disk flowers yellow, shorter than the pappus scales.
Fruits: Achenes black, those of the ray flowers compressed, sparsely short-hairy; pappus of the ray flowers minute or lacking, those of the disk flowers slightly angled, sparsely short-hairy, of 9-18 rounded or blunt, white scales with finely-or densely-fringed margins.
