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Flora of Taiwan | Family List | Compositae | Acmella

Acmella oleracea (L.) R. K. Jansen, Syst. Bot. Monogr. 8: 65. 1985.

印度金鈕扣 (鐵拳頭)

Acmella oleracea

Credit: HAST

  • Spilanthus oleracea L.

    Plants annual. Stems decumbent to usually erect, not rooting at nodes, green to red, glabrous. Petiole 2-6.4 cm long, glabrous to very sparsely pilose, narrowly winged. Leaf blade 5-10×4-8 cm, broadly ovate to deltate, base truncate to short attenuate, apex short acuminate to usually acute, usually glabrous on both surfaces, margins dentate. Peduncle 3.5-12.5 cm long, glabrous to very sparsely pilose. Heads discoid, 10.5-23.5 mm tall, 11-17 mm in diam. Receptacle 8.3-21.5 mm tall, 3.5-8.5 mm in diam. Involucral bracts 15-18, triseriate, herbaceous, entire to sinuate, sparsely ciliate; bracts of outer series 5 or 6, 5.8-7.3×2.1-2.8 mm, usually narrowly ovate to lanceolate or sometimes ovate, acute. Disc florets 400-600; corolla 2.7-3.3 mm long, yellow, 5-merous; tube 0.5-0.7 mm long, 0.2-0.4 in diameter; lobes 0.3-0.6×0.2-0.4 mm; stamens 1.4-1.7 mm long; achenes 2-2.5×0.9-1.1 mm, moderately to densely ciliate with straight-tipped hairs. Pappus of 2 subequal bristles, longer one 0.5-1.5 mm long, shorter one 0.3-1.3 mm long.

    TAIPEI: Nankang, Peng 10689, 12485. HSINCHU: Hsinfeng, Peng 6389.

    Known only from cultivation worldwide. In Taiwan, cultivated for medicinal, insecticidal and horticultural purposes.


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