戴星草

Stems 40-50 cm tall, usually robust, glabrous or pubescent, curved, ascending, branched, winged, wings entire. Cauline leaves obovate-oblong, 3-5×1.5-2.2 cm, apex rounded, base narrowed. Clusters of heads globose or ovoid, ca. 8 mm across; peduncle glabrous, winged, bracts slender, acuminate. Heads campanulate, 3×2.5 mm. Involucre 3×2.5 mm, bracts subequal, oblanceolate; receptacle naked. Outer florets numerous, corolla tubular, 1.5 mm long; style apex obtuse; central florets ca. 3, corolla 1.5 mm long, 5-dentate; base of anthers entire, filaments dilated, glabrous; style cylindric, short bifid. Achenes cylindric, 1 mm long, glandular-punctate, without pappus.

PINGTUNG: Chialoshui, Chaw 393.

Tropical Africa, Asia, Malesia to Australia. Taiwan, seaside at the southernmost tip, rare.