Scandent herbs or sub-shrubs with fluted stems. Leaves alternate, simple, cordate, 5–7-palmately veined; petioles prehensile with basal thickening, which remains after leaf abscission. Capitula racemose, cymose or paniculate, disciform, heterogamous; involucre calyculate. Outer florets female, inner hermaphrodite; all florets with narrow cylindrical tube and campanulate 5-lobed upper limb; anthers sagittate at base, caudate; style arms long, slightly flattened, apex truncate or rounded. Achenes cylindrical, 8–10-ribbed, glabrous, rarely tomentellous; pappus 1–3-seriate with very many bristles.