生活型

herb

形態特徵

• Herbs creeping or ascending, 50–100 cm or more long, covered with septate hairs; stems square, angles obtuse, grooves prominent, puberulent or villous.
• Leaves petiolate; petioles villous, grooved above, to 3 cm long; blades 1–2.5 cm long, 1.5–3.5 cm wide, very broadly ovate, base cordate, apex rounded, margins coarsely toothed, upper surface sparsely dotted, veinlets palmate.
• Flowers axillary, verticillate; bracteoles elliptic or narrowly obovate, puberulent; calyx campanulate, 3–7 mm long, 5-toothed, teeth nearly equal, triangular, prominently 5-nerved, nerves terminating in teeth, puberulent; corolla tubular, 1.5–2 cm long, bilabiate, puberulent, densely so in upper parts, upper lip erect, concave, ovate, lower lip spreading, 3-lobed, central lobe concave, very broadly ovate, slightly undulate on margins, 2 lateral lobes ovate.
• Nutlets obovoid, 3-ridged, 1.5–2 mm long, 1.8 mm wide.
• Chromosome number 2n = 34.

物候

Flowering time from May to October.

引證標本

TAIPEI: Sandiauling, Cheng 764. ILAN: Tuchang, Cheng 1504. TAICHUNG: Mareppa, Sasaki s. n. 1922. CHIAYI: Mt. Ali, Sasaki s. n. 1928. KAOHSIUNG: Chishan, Fukuyama & Noriaki 4475. TAITUNG: Wushan, Hosokawa 5304. HUALIEN: Mukuanshan, Kao 4166; Tailuko, Hosakawa 5091*.

參考文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 432. 1998.  (Fl. Taiwan 2nd edit.)
• Huang and Cheng, Flora of Taiwan 4: 526. 1978.  (Fl. Taiwan)