生活型

herb

形態特徵

• Herbs, covered with septate hairs, to 60 cm tall; stems square, angles obtuse, villous.
• Leaves petiolate; petioles villous, 5–15 mm long; blades 2–6 cm long, 1–3 cm wide, elliptic, apex and base rounded, margins serrate, both surfaces minutely hairy, puberulent on veinlets, glandular dotted.
• Inflorescences verticillate cymes, forming a terminal raceme or panicle; bracteoles very broadly ovate, caudate, glabrous inside, minutely hairy outside. Flowers pedicellate; pedicel minutely hairy, 2–4 mm long; calyx ovoid, tubular, bilabiate, puberulent, densely so at base, lower teeth of upper lip narrowly triangular, spine-tipped; corolla tubular, bilabiate, upper lip 3-lobed, central lobe ovate, longer than 2 lateral lobes, lower lip undulate; stamens 4, exserted.
• Nutlets ellipsoid, smooth or very slightly reticulate, ca. 1 mm long.

分布

• 世界 : In tropical regions.

引證標本

TAIPEI: Pitang, Cheng 1500. KAOHSIUNG: Takangshan, Cheng 902; Hsiaoliukiu, Hosokawa 1833*. PINGTUNG: Oluanpi, Suzuki 6017; Mutan, Cheng 1463.

參考文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 497. 1998.  (Fl. Taiwan 2nd edit.)