生活型

herb

形態特徵

• Herbs, to 70 cm tall, covered with septate hairs; stems erect, square, angles obtuse, minutely hairy below.
• Leaves cauline, sessile or petiolate; petioles puberulent, grooved on upper side, to 3 cm long; blades ovate to oblong-ovate, upper surface sparsely minutely hairy, lower surface glabrous or minutely hairy along veinlets, 4–10 cm long, 2–5 cm wide, margins obtusely serrate to serrate.
• Flowers in verticillate cymes, often 6-flowered, forming terminal racemes or panicles, 10–25 cm long; bracteoles elliptic, upper surface sparsely minutely hairy, lower surface with dense minute hairs ca. 1.5 mm long; pedicels short, densely hairy on nerves; calyx bilabiate, upper lip 5-nerved, 3 central nerves longer than lateral 2, lower lip 2-toothed, teeth triangular, acute, 3–4 mm long; corolla light purple, tubular, bilabiate, upper lip ovate, emarginate, minutely hairy outside, folded, ca. 1.8 mm long, 1 mm wide, lower lip minutely hairy outside, ca. 1.7 mm long, 3-lobed, central lobe larger, broadly obovate, emarginate or undulate, 2 lateral lobes broadly ovate, corolla tube with a ring of hairs inside; fertile stamens 2, inserted at base of lower lip; anthers borne on upper arm; style gynobasic; stigma unequally bifid, upper lobe shorter than lower lobe.
• Nutlets obovoid, smooth, ca. 1 mm wide.

分布

• 台灣 : in lowlands throughout the island.
• 世界 : In Japan, Korea, mainland China, the Philippines, Malesia and Australia.

引證標本

KEELUNG: Keelung, Sasaki s. n. 1933. NANTOU: Sun Moon Lake, Cheng 770. CHIAYI: Kao 7879*. TAINAN: Wushantou, Morimoto s. n. 1943. TAITUNG: Taitoshan, Yamamoto s. n. 1930.

參考文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 527. 1998.  (Fl. Taiwan 2nd edit.)