生活型

herb

形態特徵

• Rhizome short creeping, densely tufted. Culms 30-80 cm tall, acutely triquetrous, scabrous above.
• Leaves rather many, 3-5 mm wide, glaucous green; sheaths elongated, brownish or yellow-brown.
• Spikes 3 to 5, upper ones subfastigiate, lowest 1 or 2 spaced; terminal spike staminate, linear, 2-8 cm long, rusty-brown; lateral spikes pistillate or with a short staminate part at apex, cylindrical, 2-8 cm long, 3-4 mm thick, densely many-flowered, glaucous green, sessile to long-peduncled. Bracts several, lower ones leafy, much surpassing inflorescence, sheathless.
• Pistillate glumes obovate to elliptic, ca. 2 mm long excluding awn, pale and spotted with dark brown flecks, emarginate at apex; awns recurved, scabrous, 1-2 mm long. Utricles ovate, patulous, 2.5-3.5 mm long, lenticular, glaucous-green with reddish brown tannin cells, densely covered with glandular papillae, nerveless, abruptly contracted at both ends, beak rather short, truncate or emarginate. Achenes subloosely contained, orbicular or nearly so, 1.6-2 mm long, biconvex; stigmas 2.

分布

• 台灣 : in wet grassy place and grassy swamps, 500-2,500 m.
• 世界 : Sri Lanka, the Himalaya, China, Japan, Korea, Thailand and Malesia.

引證標本

TAIPEI: Chishingshan, Shimada s. n. 1918. ILAN: Chialo Lake, Leong 1178. HSINCHU: Yuanyang Lake, Lin 21855. TAICHUNG: Wuling, Leong 882.

參考文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 225. 2000.  (Fl. Taiwan 2nd edit.)