生活型

herb

形態特徵

• Erect or ascending herbs, mostly less than 50 cm tall; stems terete or subquadrangular, often prostrate and rooting at lower nodes, sparingly hairy or nearly glabrous.
• leaves thin, ovate, 3–6 cm long, 2–4 cm wide, apex acute, base obtuse or rounded, margins entire or nearly so, sparingly upper surface strigose, lower surface nearly glabrous; petiole to 2.5 cm long.
• Spikes terminal, subsessile, to 6 cm long; bracts ovate, foliaceous, ca. 1.5 cm long, margins conspicuously ciliate; bracteoles 2, linear; calyx 5-partite, segments linear, pilose on dorsal surface; corolla white, scarcely larger than bract, limb puberulent without; stamens inserted above middle of corolla tube; style ca. 2 mm long, slightly hirtellous.
• Capsule ovoid, puberulent, ca. 5 mm long; seeds orbicular, ca. 1.5 mm in diameter.

分布

• 世界 : Native of tropical America, now naturalized in southern Taiwan, the Philippines,, Marianna Island and the Caroline Islands.

引證標本

CHIAYI: Tapu, Sasaki s. n. 1930. TAINAN: Chiali, Morimoto s. n. 1941. PINGTUNG: Is. Hsiaoliuchiu, Hosokawa 1805; Chuanfanshih, Hsieh 766. TAITUNG: Lanyu (Botel Tobago), Huang & Kao 5365.

參考文獻

• HSIEH, Chang-Fu and HUANG, Tseng-Chieng, Flora of Taiwan, second edition 4: 651. 1998.  (Fl. Taiwan 2nd edit.)