生活型

herb

形態特徵

• Annual or biennial herbs. Stems erect or ascending, simple or loosely branched, 5–15 cm long.
• Leaves mostly on lower half of stems, opposite, membranaceous; petiole 2–6 cm long, glabrous or pubescent; blade obovate or spatulate, 0.5–3 cm long, 0.8–2 cm wide, apex obtuse, base gradually narrowed, attenuate into petiole, subentire to coarsely few-toothed.
• Inflorescence a terminal, loosely flowered raceme; bracts linear, acute, 1–2 mm long; pedicel 3–13 mm long, short glandular-pubescent; calyx campanulate, 4–6 mm long, 5-lobed; corolla bilabiate, pale purple with yellow spots on lower lip inside, 9–10 mm long; stamens 4, didynamous.
• Capsule enclosed by persistent calyx, globose, 3–4 mm across. Seeds narrowly ellipsoid, ca. 0.3 mm long, brown.
• Chromosome number: 2n = 40.

分布

• 台灣 : a weed of waste grounds and cultivated fields in lowlands.
• 世界 : Widely distributed in India and Asia.

引證標本

TAIPEI: Shihting, Yang 2336; Shihliufengtzu, Peng 10604; Yangmingshan, Peng 12668, Patoutze, Peng 7569; Nankanshan, Peng 10452. ILAN: Tuchang, Suzuki 3721. HSINCHU: Shangkuanli, Peng 6426; Chunan Seashore, Yang 20190. MIAOLI: Nanchung, Kao 7858. TAICHUNG: Chingshui, Peng 4490; Chung Hsing Univ. Peng 6442 NANTOU: Chitou, Yang 1632. HUALIEN: Taroko to Tatung, Leu 54; Kuanyuan, Lammers 8473.

引用文獻

• LIU, Ho-Yih, Flora of Taiwan, second edition 4: 612. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)