生活型

herb

形態特徵

• Stems erect, ascending or prostrate, to 60 (–100) cm tall, strigose-pilose, branched at base.
• Leaves chartaceous, lanceolate, 3–10×0.5–2.5 cm, apex gradually acuminate, base narrowed, sessile or short petiolate, serrulate, densely strigose-pubescent on both surfaces.
• Heads 6 mm across; peduncle slender, 2–4.5 cm long; involucre globose-campanulate, 5×6–7 mm, enlarging to 11 mm broad in fruit, bracts 5 or 6, 2-seriate, oblong, acute, outer ones longer. Ray florets in 2 series; corolla white, 2.5–3×0.4 mm, bifid or entire. Disc florets many, corolla white, 1.5 mm long, 4-lobed.
• Achenes 2.8×1.5 mm, ribbed on margins.
• <i>Eclipta prostrata</i> is a highly variable species widely distributed in separated parts of the world. Habit of this species is greatly influenced by the habitats in which they grow.

分布

• 台灣 : common in ditches and paddy fields.
• 世界 : Warmer parts of the world.

引證標本

TAIPEI: Farm of Natl. Taiwan Univ., Peng 2572. ILAN: Chilan, Peng 2065. TAOYUAN: Yungan, Peng 1555. HSINCHU: Chupei, Peng 15226. CHIAYI: Tungshih, Auko, Peng 1694. PENGHU: Huhsi, Peng 1959. TAINAN: Anping, Susuki s. n. 1921. TAITUNG: Tawu, Hsu & Hsu 4074; Lanyu Is., Huang & Kao 6384. HUALIEN: Chingshui, Shimizu & Kao 11570.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 935. 1998.  (Fl. Taiwan 2nd edit.)