生活型

herb

形態特徵

• Annual erect herbs, 30–70 cm tall; stems loosely branched, quadrangular, recurved puberulent.
• Leaves opposite, petiole 0.3–1.6 cm long; blade narrowly ovate, chartaceous, 1.5–3.5 cm long, 1–1.7 cm wide, subglabrous or sparsely pubescent, densely impressed glandular, acute at both ends, attenuate into petiole, margins with 5–10 pairs of shallow teeth, glabrous and glandular dotted on both surfaces.
• Inflorescences terminal and axillary racemes, 2.5–15 cm long, rachis subdensely puberulent; bracts narrowly ovate to narrowly lanceolate, 2–3 mm long, densely fine white pilose; pedicel ca. 1 mm long in flower, 2 mm long in fruit, subdensely puberulent; calyx campanulate, bilabiate, ca. 2 mm long in flower, 4 mm long in fruit, pilose outside, glandular dotted, upper lip 3-lobed, lobes ovate-lanceolate, apex acuminate, lower lip deeply bilobed, lobes triangular-lanceolate, acuminate; corolla tubular, bilabiate, ca. 3–4 mm long, pinkish or whitish; stamens 2, included; staminodes 2, anterior.
• Nutlets globular, 1.2 mm long, densely netted.
• Chromosome number 2n = 18.

分布

• 世界 : Japan, Korea, C. to S. China and Vietnam.

引證標本

TAIPEI: Chishingshan, Hsu 5080; Inhotung, Cheng 1578; Kueishan, Huang 7538; Siaokoto, Hsu 1033; Tan-shui, Cheng 1568; Tatunshan, Kuo 8692 & 8992, Kao 9292; Wangtan, Cheng 1496; Wulai, Hsieh 881; Yangmingshan, Cheng 1030. ILAN: Chiaochi, Kao 4002; Nanshan, Chuang & Kao 2428; Taipingshan, Suzuki s. n. 1928; Tungao, Huang 5062. TAOYUAN: Jenmei, Kuo 6456; Tachih, Fujita s. n. 1937. HSINCHU: Kuanwu, Huang 6607, Wutzeshan, S. coll. s. n.*. MIAOLI: Tunglo, Huang 13136. TAICHUNG: Sungmao, Kuo et al. 8756. NANTOU: Lushan, Cheng 1563. KAOHSIUNG: Tengchih, Huang 15870. HUALIEN: Tienshiang, Shimizu & Kao 10602.

參考文獻

• HUANG, Tseng-Chieng, HSIEH, Tsung-Hsin and CHENG, Wu-Tsang, Flora of Taiwan, second edition 4: 492. 1998.  (Fl. Taiwan 2nd edit.)