生活型

herb

形態特徵

• Herbs, to 80 cm tall, covered with septate hairs; stems erect, slender, square, angle obtuse, puberulent and villous.
• Leaves petiolate; petioles slender, 1–3 cm long, puberulent; blades ovate to very broadly ovate, 2–4 cm long, 1.5–3 cm wide, base truncate or subcordate, apex acute or obtuse, margins serrulate, both surfaces minutely hairy.
• Flowers in verticillate cymes forming terminal raceme; bracteoles 4–5 mm long, narrowly ovate, acuminate, minutely hairy, longer than pedicels; pedicels minutely hairy, 2–3 mm long; calyx tubular-campanulate, bilabiate, minutely hairy outside and inside, 7–8 mm long, upper lip broadly ovate, acute, 2.5–3 mm long, ca. 2 mm wide, lower lip 2-toothed, teeth triangular, ca. 2 mm long; corolla reddish-purple, tubular, minutely hairy outside limb, tube with a ring of hairs inside, 8–10 mm long; fertile stamens 2, filaments ca. 3 mm long, upper arm ca. 3 mm long, lower arm ca. 1 mm long; anthers ca. 1.5 mm long; stigma unequally bifid.
• Nutlets ellipsoid, smooth, ca. 1.5 mm long.

物候

Flowering time from August to September.

分布

• 台灣 : Escaped and naturalized at middle elevations of Taiwan.

引證標本

TAIPEI: Chushanyen, Shimada s. n. 1914. NANTOU: Chunyang, Cheng 1561*; Wushe, Huang s. n. 1971. PINGTUNG: Kuraru, Matuda 519. HUALIEN: Tongmen, Suzuki 1359.

參考文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 518. 1998.  (Fl. Taiwan 2nd edit.)
• Huang and Cheng, Flora of Taiwan 4: 511. 1978.  (Fl. Taiwan)