生活型

herb

形態特徵

• Annual or biennial herb, usually caespitose, 5-20 cm tall; stem elongate, creeping at base, branched upward, glandular hairy above; branches wide-spreading or almost erect.
• Leaves linear, 7-18 mm long, 0.8-1.5 mm wide, apex acute to acuminate, mucronate, connate to a tube at base, glabrous on both surfaces
• Flowers solitary, small, white or greenish white, terminal or axillary; pedicels slender, glandular-hairy, 1-2 cm long; sepals mostly 5, sometimes 3, 4 or 6, broadly elliptic or ovate, 2-2.5 mm long, obtuse, with a prominent midrib and 2 obscure lateral nerves, glandular-hairy; petals 5 or rarely absent, ovate or elliptic, 1-1.5 mm long, rounded at apex, entire, glabrous; stamens 5 or 10, filaments slender, 1-1.5 mm long, glabrous.
• Capsules globose, 2-3 mm long, 5-valved; seeds broadly ovoid, 0.3-0.5 mm long, usually echinate-papillate, dark brown.

分布

• 台灣 : a common weed at low to high elevations throughout the island
• 世界 : Japan, Korea and mainland China to India.

引證標本

TAlPEI: Taipei, Tanaka s. n. 1930; Luchou, Shimada 3425. ILAN: Is. Kueishan, Hsu 7239. NANTOU: Hohuanshan, Ying 591; Chitou, Ying 801.

引用文獻

• YING, SHAO-SHUN, Flora of Taiwan, second edition 2: 362. 1996.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)