形態特徵

• An undershrub, 40–60 cm high.
• Leaves trifoliolate; leaflets ovate-oblong, 10–15 mm long, 5–10 mm wide, mucronate at the apex, the upper surface glabrous, the lower surface clothed with appressed hairs.
• Racemes in axillary peduncles; peduncles slender, longer than the leaves;calyx deeply cleft, the teeth lanceolate; corolla 4–5 mm long, white; cleistogamous flowers in lower axils, without pedicels.
• Pods 4 mm by 3 mm, oval-oblong, less than the calyx in length, clothed with thin appressed hairs.

分布

• 台灣 : In open grassland, at elevation between 1,000 and 2,500 m high, in the northern and central mountain area.
• 世界 : Japan, Korea, China and the Ryukyus.

引證標本

TAICHUNG: Lishan, Huang 3152*. NANTOU: Lushan-Wushe, Huang 1889.

參考文獻

• Huang, S. F. & T. C. Huang, Taiwania 32(1): 11-118. 1987.
• Huang, S. F. & T. C. Huang, Flora of Taiwan, second edition 3: 322. .  (Fl. Taiwan 2nd edit.)