Chrysanthellum Rich.

Herbs, annual, erect or prostrate with short, slender taproot. Leaves alternate or opposite, entire or dentate to bipinnately dissected with fine divisions. Glabrate; petiole slender, slightly stem clasping. Inflorescence of solitary, ascending heads on slender, glabrate peduncles with scale-like or foliaceous bracts. Heads radiate. Involucral bracts in 2 - 3 series; outer ones few, linear-lanceolate, conspicuously thickened at base. Receptacle semiglobose; pales usually persistant. Ray florets many; corolla yellow with a short tube and 2 longitudinal distinct ribs with 2 - 3 denticulations at the apex. Ovary laterally flattened. Disc florets many; corolla campanulate with five lobes, glabrous. Anthers dark. Style branches with flattened, pilose margins. Achenes often dimorphic; outer ones oblong, tuberculate, sometimes puberulent, apex slightly expanded into 2 lateral ears; inner ones black, flat, with massive, light coloured wings. Pappus lacking.

Distributed in the tropics of old and new world; ca 6 species, 1 in India.

List of Lower Taxa