生活型

herb

形態特徵

• Perennial herbs. Stems decumbent, 5–20 cm long, with many stems and rosulate leaves at apex, covered with septate hairs.
• Rosulate leaves oblanceolate or spatulate, 4–9 cm long, 0.7–2.5 cm wide, apex rounded, gradually narrowed to base, margins coarsely serrate to sinuate, cauline leaves oblong-ovate or oblong-oblanceolate, 1.5–4 cm long, 0.5–2 cm wide, apex obtuse, base acute or cuneate.
• Cymes axillary, 2- or 3-flowered, opposite, forming a 4–6 flowered verticillaster; calyx campanulate, 3–4 mm long, long pilose outside; upper lip 2 mm long, shallowly 2-lobed; lower lip 3–4 mm long, 3-lobed; stamens 4, didynamous, exserted; pollen grains tricolpate, subprolate, 26×20 μm, tectum perforate, exine reticulate to rugulate.
• Nutlets ellipsoid, 1.8–2.0 mm long.
• Chromosome number 2n = 32.

分布

• 台灣 : grows only along the roadside at Fenchihu near Alishan; it may have been introduced by the Japanese with <i>Wasabia tenuis</i> (Miq.) Mastumura and naturalized in this area.
• 世界 : Japan, Korea and C. to S. China.

引證標本

CHIAYI: Fenchihu, Huang 2592,10465, 13976*.

引用文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 438. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)