Spilanthes paniculata Wall. ex DC.
Glabrous annuals; stems branched, erect or ascending, to 30 cm or more tall. Leaves petiolate, ovate to ovate-lanceolate, 2-4 cm long, 1-2.5 cm broad, apex acute, base cuneate, 3-nerved, entire, coarsely or crenately serrate; petiole 1-2 cm long. Peduncle 2.5-16 cm long, sparsely pilose. Heads discoid, solitary, terminal or axillary, 8.4-12.5 mm tall, 6.9-10 mm in diam. Receptacle 5-8 mm tall, 1.1-3 mm in diam., apex acuminate. Involucral bracts 9-12, in 2-series, ovate-lanceolate, ca. 6 mm long, herbaceous, glabrous. Disc florets 90-200; tubular, minute, 4- or 5-lobed. Achenes obovoid, 3-angled, ca. 3 mm long, apex slightly depressed, margins scabrid. Pappus of 2 subequal bristles, longer one 0.5-1.1 mm long, shorter one 0.4-0.9 mm long.
TAIPEI: Wulai, Sasaki s. n. 1932. NANTOU: Lienhuachih, Sasaki s. n. 1925. TAINAN: Paiho, Tatungshan, Yen 6. KAOHSIUNG: Takangshan, Monitani 2372. TAITUNG: Lanyu Is., Peng 5278, 6588.
Distributed in south, southeast Asia and south China. Taiwan, in low open places.