生活型

herb

形態特徵

• Suffruticose plants, to 1.5 m tall, glabrous or covered with septate hairs; stems square, angles prominent.
• Leaves petiolate; petioles minutely hairy, 1–4 cm long; blades 5–10 cm long, 2–5 cm wide, ovate to elliptic, base cuneate, apex acute, margins serrate, often incised, both surfaces minutely hairy, glandular dotted beneath.
• Inflorescences of cymes forming capitate clusters, axillary or terminal; peduncles 5–10 cm long, square, minutely hairy; bracteolate, upper surface of bracts glabrous, lower surface minutely hairy. Flowers sessile or with short pedicel; calyx campanulate-tubular, minutely hairy at base and on margins, 5-toothed, teeth equal or nearly so, compressed spine-like; corolla white, tubular, limb bilabiate, minutely hairy in upper part, short, 0.5–1 mm long, upper lip very broadly ovate, emarginate, lower lip 3-lobed, central lobe large; stamens 4, didynamous, exserted, anthers 2-celled, filaments glabrous; stigma bifid.
• Nutlets ellipsoid, smooth, ca. 1.2 mm long.

分布

• 世界 : throughout the tropical regions of the world.

引證標本

TAIPEI: Neihu, Huang 3468. HSINCHU: Kashoshan, Kudo & Mori s. n. 1930. TAICHUNG: Tungshih, Simizu 516. NANTOU: Chingshuikou, Huang 1862. CHIAYI: Talin, Huang 3417. TAINAN: Chaohsing, Kao 6640. KAOHSIUNG: Meilong, Hsu 1647. PINGTUNG: Nanjenshan, Huang 4764; Pingtung Agricultural College, Huang 4175*. TAITUNG: Tipinsya, Mori 2837.

參考文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 466. 1998.  (Fl. Taiwan 2nd edit.)