生活型

herb

形態特徵

• Perennial herbs, prostrate. Stems radiating from a woody root crown, up to 80 cm long, compressed-terete, 2–3 mm across, green flushed with purplish red, glandular and puberulent to glabrous, woody towards the base.
• Leaves somewhat fleshy, opposite, in unequal pairs; blades narrowly ovate, oblong-ovate, broadly lanceolate or lanceolate, (0.4–1.2–)1.5–3 cm long, (0.4–0.6–)0.8–2.5 cm wide, acute to rounded at the apex, usually minutely apiculate, obtuse to truncate at the base, upper surface dark green, somewhat flushed with purple, finely puberulent, lower surface greyish white, usually flushed with purplish red, sparsely puberulent on veins, margins entire, cartilaginous, more or less undulate, glabrous or sparsely hispidulous; petioles up to 1.8 cm long, purplish red, slightly puberulent.
• Inflorescences of pedunculate cymes or pseudoumbels, axillary, or a small terminal panicle with a clear central axis, peduncles 1–8 cm long, simple or 2–3 branched, capillary at apex, purplish red, subglabrous, each branch of peduncle subtended by a bract, bracts linear lanceolate, 1 mm long, puberulent, caducous. Flowers simple or usually 3–6 clustered at the apex of peduncle, sessile; bracteoles usually 2, subtending a flower, in an unequal pair, linear or inear-lanceolate, 0.8–1.2 mm long, 0.2–0.3 mm wide, pale yellow flushed with purple, puberulent; perianth constricted below the middle, the limb campanulate 1.2–1.5 mm long, 3 mm across, white flushed with purple, shallowly 5-lobed, the lobes 1.5 mm wide, emarginated, with protuberance bearing hairs on the sinus, sparsely puberulent and glandular on the abaxial surfaces; stamens 1–2, filaments 1.2 mm long, anthers dithecal, orbicular, 0.5 mm across, white flushed with purple; style 1.2 mm long, stigma capitate, 0.3 mm across, white flushed with purple.
• Anthocarps obovoid or ellipsoid, 2.2–3.5 mm long and 1.3–1.8 mm wide, rounded at apex, 5-ribbed, the ribs purple or green flushed with purple, glabrous, the furrows pale, densely stipitate glandular.

分布

• 台灣 : on sandy beaches and coastal slopes, or slightly inland on the roadsides of coastal villages and sometimes in sandy plantations.
• 世界 : Distributed from Java north to Micronesia, the Ryukyus and Hawaiian Islands.

引證標本

PENGHU: Chimetao, Huang 014 (TAI); Huhsi District, Lintou, Peng & Peng 12727 (HAST). PINGTUNG: Kuanshan, Peng 12530 (HAST); Maopitou, Huang & Chen 4352 (TAI); Hsiaoliukiu, Huang 9039 (TAI). TAITUNG: Lanyu, Sasaki s.n.1926 (TAI); Fushan Bridge, Da Wu Hsiang, Liu & Su s .n. 2003 (TAI); Sanhsientai, Lin et al. 658 (HAST). HUALIEN: Chih-hsin-tan, Chen s. n. 2002 (NHU); Lingting, Chian, Huang et al. 5225 (TAI).

參考文獻

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