生活型

herb

形態特徵

• Perennial herbs, prostrate to ascending, up to 80 cm tall. Stems terete, 2–5 mm across, green flushed with purplish red, glandular puberulent and sparsely pilose.
• Leaves somewhat fleshy, opposite, in unequal pairs; blades ovate, broadly ovate to suborbicular, (1.5–3–)3–8 cm long and (1–2.5–)2–7 cm wide, obtuse to rounded at apex, truncate to subcordate at base, margins entire, cartilaginous, undulate to slightly lobed, distinctly long-ciliate, upper surface yellowish green, green to bluish green, obscurely glandular to glabrous, lower surface pale, pubescent on veins; petioles up to 4 cm long, pale flushed with purplish red, long-hairy.
• Inflorescences of cymes, in a terminal open panicle, up to 60 cm long, the panicle 4–8 branched, more or less zigzag, ascending, with sticky internodal bands, the peduncles stout at base, capillary at apex, green flushed with purplish red, obscurely glandular, each branch of inflorescence subtended by a bract, bracts ovate and ciliate, 1.5 mm long and 1 mm wide, caducous. Flowers 3–6, clustered at the apex of peduncle, subsessile; bracteoles usually 2, subtending a flower, in an unequal pair, linear-lanceolate or lanceolate, pale yellow flushed with purple, pilose and glandular on margins and abaxial surfaces; perianth constricted near the middle, the limb campanulate-tubular, 1.2–2 mm long, 2 mm across, magenta to dark red, shallowly 5-lobed, the lobes 0.8 mm wide, emarginated, with protuberance bearing hairs on the sinus, the abaxial side with a calyx-like surface, pilose above and glandular below; stamens 1 or 2, filaments 0.6 mm long, purple, anthers dithecal, orbicular, 0.4 mm across, purple to orange red; style 1 mm long, purple; stigma capitate, purplish red; ovary 1.2 mm long.
• Anthocarps obconical-clavate, 4–4.5 mm long, 1.8 mm wide, rounded-subtruncate at apex, 5-ribbed, the ribs green, prominently stipitate-glandular, the furrows pale, densely puberulent, straw-colored when mature.

物候

Flowering and fruiting are throughout the year.

分布

• 台灣 : in lowlands in waste places, roadsides, river banks and lawns, and associates with other weedy plants commonly found in disturbed areas.
• 世界 : Native to tropical America, perhaps to the Caribbean Islands. In North America it occurs along the Pacific coast of southern California and also in the southeastern states. Introduced and naturalized in Africa, Australia, Hawaii.

引證標本

MIAOLI: Tongshiao, Peng 5447 (HAST). CHANGHUA: Tatushi, Tang 1010 (TAI). YUNLIN: Houan, Yang 485; Chinhu, Huang et al. 15312. TAINAN: Kuo-Sin-Ya Temple, Chen s. n. 1988 (NHU). KAOHSIUNG: Chungchou, Huang 4640 (TAI); Yochang, Chen s. n. 2006 (NHU). PINGTUNG: Chaochou, Lin 66 (NHU); Chiuju, Chiang 203 (HAST). TAITUNG: Lutao (Green Island), Hua s. n. 2002 (NHU). HUALIEN: Hualien City, Meilung, Yung s. n. 1990 (NHU).

參考文獻

• Chen, Shih-Huei and Wu, Ming-Jou, Taiwania 52(4): 332-342. 2007.