生活型

herb

形態特徵

• Annual herbs, 1.3 m high. Stem covered with long hairs.
• Leaves alternate, stipules partially connate, bifid at apex, intrapetiolar; petioles 7-11 cm long; lamina broadly ovate, 8-17 cm long, 6-13 cm broad, irritant hairs scattered on both surfaces, base rounded to cordate, apex acuminate, margin dentate.
• Inflorescences bisexual, axillary, paniculate; peduncle covered with irritant hairs. Male flowers: tepals 4 or 5, with few long glandular or irritant hairs at the apex; stamens 4 or 5, white. Female flowers: tepals 4, the two lateral ones ca. 0.5 mm long, the dorsal one ca. 0.25 mm long, geniculate, bearing 3-5 glandular hairs, the ventral one very minute. Ovary asymmetrically ovoid, stigma linear, unbranched; pedicel ca. 0.5 mm.
• Achenes asymmetrically ovoid; pedicel up to 2 mm long

分布

• 台灣 : found at low elevations in the central part.
• 世界 : Tropical America, West Indies, Tropical Africa, Madagascar, Arabia, India, Sumatra, Java and Lesser Sunda Islands.

引證標本

TAIWAN. NANTOU: Puli, 2 Sep 2001, T. W. Hsu 10402 (TESRI); Jushan, 18 Oct 2002, T. W. Hsu 11066 (TESRI).

參考文獻

• Tsai-Wen Hsu, Tzen-Yuh Chiang, Nien-June Chung, Taiwania 48(1): 72. 2003.