Adenostemma J.R.Forst. & G.Forst.

Perennial herbs, poorly branched. Leaves opposite. Inflorescence a lax terminal cyme, with foliaceous bracts. Involucre 1–2-seriate, spreading and then reflexed with age, phyllaries basally connate; receptacle flat becoming convex with age, deeply alveolate. Florets hermaphrodite, corolla white, funnel-shaped or almost cylindrical, tube sparsely glandular-hairy, lobes short, triangular with distal collar of dense long hairs which mat the corollas together; anther-bases obtuse, apical appendages obtuse, broader than long; style yellow, arms swollen and flattened, glabrous or with few short black hairs. Mature achenes oblong, slightly curved, distinctly 3-angled with distinct apical nectary. Carpopodium distinct, asymmetrical; pappus of pegs, connate about the nectary, tipped with dark brown, viscid, glandular knobs.