生活型

herb

形態特徵

• Not tufted; rhizome corm-like, woody, clothed with dark brown scales and their fibrous remnants. Culms erect, 35-70 cm tall, slender, acutely triquetrous, smooth, leaved at base.
• Leaves few, much shorter than culm; blades narrowly linear, 2-6 mm wide, folded, occasionally with slightly recurved margins; sheaths light brown.
• Corymbs as a rule simple, sometimes in part subcompound, with 2-7 slender unequal patent rays 1-10 cm long; spikes ovoidal, subloosely bearing 4-14 spikelets; leafy bracts 2-4, lowest 1.5-2 times as long as corymb, second slightly shorter than to nearly equalling corymb, remainder setaceous. Spikelets linear, 1-2.5 cm long, 1.5-2 mm wide, nearly quadrangulous, subloosely 6-14-flowered, straw-colored, rachilla flexuose, narrowly winged, turning dark brown.
• Glumes suberect, elliptic, boat shaped, 3.7-4 mm long, obtuse at apex, thinly chartaceous, straw colored to straw-brown, 7- or -9-nerved, keel convexed. Achenes elliptic or obovate, triquetrous with concave sides, ca. 1/2 as long as glume, maturing blackish, minutely puncticulate; stigmas 3. Stamens 3.

分布

• 台灣 : Open wet grasslands on low hills; rare in Taiwan.
• 世界 : Africa, India, Indochina, Malesia, northern Australia, southern China.

引證標本

TAITUNG: Lanyu Is., Kuoh 4874*; Hokanshan, Hayata s. n. (TI). KAOHSIUNG: Liukuei, Okamoto s. n.

引用文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 251. 2000.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)