生活型

herb

形態特徵

• Stems slender, branched.
• Leaves broadly linear, green or brownish green, undulate, serrulate, obtuse or rounded, sessile; stipules membranaceous, truncate. Spikes with few laxly disposed flowers; peduncle straight, to 5 cm long, brown.
• Flowers emergent. Fruit ovoid, beak long, slender, few-toothed on lower ridge.

分布

• 台灣 : Submersed in streams, sometimes in ponds, throughout the island.
• 世界 : Cosmopolitan.

引證標本

TAIPEI: Chingmei, DeVol 9083. ILAN: Ilan, Yang 45. TAOYUAN: Tachi, Yang 57. CHANGHUA: Yuanlin, Yang 66. NANTOU: Chiaotun, Hsu s. n. Jul 1971. HUALIEN: Hualien, Yang 63b.

參考文獻

• YANG, Yuen-Po, Flora of Taiwan, second edition 5: 21. 2000.  (Fl. Taiwan 2nd edit.)