Hyalosperma

Annual herbs, cottony or almost glabrous. Leaves entire, sessile, semi-terete, alternate or the lower ones opposite. Capitula solitary, terminal, discoid. Involucral bracts 3–many-seriate; outer bracts with hyaline margins, lacking a petaloid lamina; inner bracts often with a petaloid lamina; receptacle convex to conical, glabrous, ebracteate, pitted. Florets bisexual or the innermost functionally male; corolla 3–5-lobed; anthers as many as corolla-lobes, tailed; style branches rounded or broadly to narrowly deltoid at apex, minutely to prominently papillose. Cypsela with soft, translucent pericarp, glabrous or with globose, mucilage-producing hairs; pappus of plumose bristles united basally or for c. half their length.