生活型

herb

形態特徵

• Annual erect to ascending herbs to 40 cm long, often branched from base; branches 4-angled, glabrous.
• Leaves opposite, subsessile, linear to linear-lanceolate, 1.5–6 cm long, 1.5–7 mm wide, apex acuminate, base cuneate to attenuate, margin often revolute, glabrous, midrib prominent, lateral veins and veinlets obscure; stipular sheath deltate, margin bristly.
• Flowers solitary or in pairs, rarely 3 together, axillary, pedicel 1–6 mm long; calyx lobes oblong-ovate, ca. 2 mm long, glabrous; corolla white or purplish, 2–3 mm long, glabrous inside; stamens inserted at apex of tube, exserted; style ca. 2.5 mm long.
• Fruit globose, 2–3 mm in diam.

分布

• 台灣 : a very common lowland plant throughout the island.
• 世界 : Tropical Asia to Japan.

引證標本

TAIPEI: Shipai, Chao 617; Taipei, Chuang 3044. KEELUNG: Hsingshan, Huang & Yang 3783. TAOYUAN: Jenmei, Kuo 6301; Yungan, Kao 8760. TAICHUNG: Neipu, Hsu 9286; Tachia, Kao 9678. NANTOU: Hueisun, Wang & Yang 4253; Sun Moon Lake, Huang 5662. CHIAYI: Alishan, Kudo & Suzuki 16244; Chiayi, Kao 7881. TAINAN: Chiayi Farm, Huang & Huang 14169. KAOHSIUNG: Chishan, Huang 2424. PINGTUNG: Kaoshu, Kao 9561; Nanjenshan, Huang & Huang 13080. TAITUNG: Lanyu, Hsu 4904. HUALIEN: Humin, Kao 9797; Hungyeh, Huang & Huang 14117.