Pycnosorus

Taprooted annual or perennial herbs or subshrubs. Leaves mostly cauline, sessile, alternate, basal ones withering early. Capitula discoid, minute, many in terminal subglobose to ellipsoid compound heads, each capitulum subtended by a scarious or partly herbaceous capitular bract and few scarious caducous involucral bracts, the whole usually surrounded by a (sometimes obscure) common involucre of herbaceous bracts; common receptacle subglobose to ovoid; capitular and involucral bracts and scales yellowish or golden. Florets 3–8 per capitulum, tubular, bisexual; corolla 5-lobed, longer than bracts, yellow; anthers tailed at base and with triangular apical appendages; style bilobed, branches flattened, truncate, papillose, apices fimbriate. Cypselas obovoid, silky; pappus a variously fused ring of plumose bristles, yellow at least apically.