生活型

herb

形態特徵

• Herbs perennial, erect, 15 to 60 cm tall, basal stems procumbent, stems square with scattered hairs.
• Leaves opposite, ovate, 4-9 cm long, 2-5 cm wide, obtuse at apex, acute to round at base, entire, the lateral nerves 5-8-paired.
• Inflorescences terminal racemes, often unilateral; bracts 3, deltoid, minute; calyx lobes 5, linear, 4-5 mm long, about 1 mm wide, setaceous; corolla zygomorphic, about 1.0-1.3 cm in diameter, white, bell-shaped, corolla-tube 1.5-2.0 cm long, straight, narrow, the throat campanulate, the limb lobes 5, lobes near orbicular, 4 mm in diameter, under one has purple blotches inside; stamens 4, didynamous, included, filament 3-5 mm long; anthers 2-loculate; style 2.5 mm long; ovary with 2 ovules per locule.
• Capsule club-shaped, 2.0-2.5 cm long, 4 mm diameter, distinctly stipitate, pubescent, enclosed in persisent calyx; seeds 2-4, about 3 mm in diameter, compressed orbicular.

分布

• 世界 : native in Africa, India and Sri Lanka. The introduction of this weed has caused serious disturbance to natural habitats, particularly in Malaysia, Indonesia and the Pacific islands.

引證標本

Tainan Co.: Baihe Town, Kuanziling, Hongye Park, meadow, locally abundant, Jan. 26, 2005, T. W. Hsu & J. J. Peng 11756 (TESRI, Taiwan Endemic Species Research Institute).

參考文獻

• Tsai-Wen Hsu, Tzen-Yuh Chiang and Jen-Jye Peng, Taiwania 50(2): 117-122. 2005.