生活型

herb

形態特徵

• Small perennial herbs; stems tufted, pubescent, rooting at lower nodes, 10–30 cm long.
• Leaves membranaceous; petioles 5–10 mm long, pubescent, with one vascular bundle; blades broadly ovate, 1–2.5 cm long, 0.8–1.6 cm wide, apex subacute, base rounded or broadly truncate, margins crenate-serrate, glabrous on both sides except on nerves, with glandular dots on lower surface.
• Cymes terminal and in upper leaf axils, opposite, loosely flowered verticillasters; bracts linear, acute, ca. 1 mm long, puberulous; pedicels 3–4 mm long, pubescent; calyx tubular, bilabiate, 3–4 mm long, puberulent on nerves, upper teeth recurved, lower 2-lobed teeth subulate, ciliate; corolla bilabiate, straight, 4–5 mm long, barely exserted; upper lip 1 mm long, 2-lobed, elliptic; lower lip 2 mm long, 3-lobed, broadly ovate; stamens 4, didynamous; anthers 2-celled, divergent.
• Nutlets rounded, surface discoid with some radiating ridges.
• Chromosome number 2n = 18.

分布

• 台灣 : along the roadside.
• 世界 : Japan, Korea, China, Malesia, Burma and India.

引證標本

TAIPEI: Wantang, Cheng 739; Tsunankon, Cheng 704; Wulai, Huang 3415; Pianchiou, Hsieh 1491; NTU campus, Hsieh 1441; Yangmingshan, Cheng 1031. ILAN: Nanshan, Huang 7681; Liumaoan, Hsieh 1461; Suyuanyako, Hsieh 1463; Yuanyan lake, Hsieh 1497. TAOYUAN: Pushin, Huang 4034*. HSINCHU: Tuchang Kwangwu, Peng 14873. TAICHUNG: Wushihken, Hsieh 1498. NANTOU: Meyfong, Hsieh 1475; Sanlinchi, Huang 72. CHIAYI: Rwanpien, Huang 2551. KAOHSIUNG: Tengchih, Yang 7093. PINGTUNG: Jishueiying, Yang & Lin 22423. HUALIEN: Juisui forest road, Wang 660.

參考文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 452. 1998.  (Fl. Taiwan 2nd edit.)