生活型

herb

形態特徵

• Annual or biennial herb, glandular hairy all over; stems slender, elongate, 15-30 cm long, prostrate at base, branched upward, branches erect or ascending.
• Leaves opposite, oblong or ovate-oblong, 1.5-3.5 cm long, 1-1.5 cm wide, obtuse at apex, rounded or obtuse at base, chartaceous, margins ciliate, entire, midrib impressed above, elevated beneath, lateral veins inconspicuous; petioles short or more.
• Flowers several in terminal cymes, white, pedicels 5-14 mm long, slender; sepals 5, oblong, 4-5 mm long, 1-1.5 mm wide, acute at apex, pubescent and glandular hairy on both surfaces; petals 5, oblong, 4-5 mm long, 1.2-1.8 mm wide, bifid at apex; stamens 10, filaments slender, free, glabrous; styles 5, short hairy.
• Capsules cylindric, 6-9 mm long, much exserted, persistent calyx opening by terminal teeth, teeth 8-10, triangular, 0.2-0.3 mm long, erect. Seeds many, brown, ovoid or compressed-rounded, brown, 0.6 mm long, papillate.

分布

• 台灣 : medium altitudes to 2,300 m throughout the island, roadsides and fields, very common.
• 世界 : Widely distributed in temperate and warm regions of the northern hemisphere.

引證標本

TAIPEI: Tanshui, Tanaka s. n. 1934; Chinshan, Huang 332. NANTOU: Chitou, Ying 87. CHlAYI: Alishan, Ying s. n. 1976.

引用文獻

• YING, SHAO-SHUN, Flora of Taiwan, second edition 2: 348. 1996.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)