生活型

herb

形態特徵

• Annual or perennial. Stems creeping, branched, rooting at nodes, glabrous.
• Leaves sessile; blades linear to lanceolate, 2-8 × 0.2-0.4 cm, glabrous; sheath cylindrical, ca. 0.8 cm long, ciliate at mouth.
• Inflorescence axillary, consisting of 1-3 cincinni, enclosed in leaf sheath, bracteoles almost hidden. Flowers bisexual, actinomorphic; sepals equal, ca. 8.5 by 4 mm, one glabrous, others puberulent on ridge, apex free, united below; petals blue or pink, apex free, ca. 12 mm long; anthers trapezoidal, ca. 1 mm long; filaments ca. 12 mm long; ovary ca. 2.2 by 1 mm, apex hispid; style ca. 10 mm long, glabrous.
• Capsules with a notched tip, ca. 3.5 mm long, apex hispid. Seeds lustrous, ca. 1.6 by 1 mm, deeply pitted.

分布

• 台灣 : irrigation ditches at low elevations in the south; very rare.
• 世界 : Eastern Africa, India, Sri Lanka, Indochina, southern China, Malaysia, the Philippines, Indonesia, and Australia.

引證標本

KAOHSIUNG: Taiju (Tashu), Sukemoto 63. PINGTUNG: Taiwu Hsiang, Wanan village, Ku 312, Yang 28899.

參考文獻

• WANG, Jenn-Che, CHEN, Yo-Jiun, and PENG, Ching-I, Flora of Taiwan, second edition 5: 165. 2000.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)