生活型

herb

形態特徵

• A perennial, glabrous herb, 10–80 cm high, with fibrous roots; stems branching, striate, glabrous.
• Leaves petiolate, 3–10 cm long, oblong to ovate, pinnate to tripinnate; ultimate segments ovate, narrow-ovate or linnear, the margins serrate or entire; petioles 2–10 cm long, sheathing.
• Umbels compound; involucre lacking, or of a few linear bracts; rays 5–15, 0.5–3 cm long; involucels several, linear. Flowers white; style long, persistent.
• Fruit glabrous, oblong, about 2.5 mm long, 1.5–2 mm broad, the commissure broad, the ribs low, very corky. Vittae 1 in the interval, 2 on the commissure.
• This is a very variable species. I have made extensive collections of this species and found many specimens with two different kinds of leaves, one ovate and with serrate ultimate segments and the other linear and entire.

分布

• 台灣 : In ditches, ponds, paddy fields and wet places at low to medium altitudes throughout the island.
• 世界 : Distributed in Japan, the Ryukyus, China, Malaysia, India and Australia.

引證標本

TAIPEI: Tatungshan, Kao 3613; ILAN: Taipingshan, Suzuki 1066 (Type of Oenanthe kudoi Suzuki & Y. Yamamoto in TAI). TAICHUNG: Tali, Yamamoto & Suzuki 381. NANTOU: Chitou, Huang 3338. TAINAN: Kuantzeling, Morimoto 513. TAITUNG: Is. Lanyu, Huang 9351. HUALIEN: Tienshiang, Shimizu & Kao 10556.

參考文獻

• KAO, MUH-TSUEN, Flora of Taiwan, second edition 3: 1030. .  (Fl. Taiwan 2nd edit.)