生活型

herb

形態特徵

• Annual; culms densely tufted, 10-30 cm by 0.7-1.3 mm, compressed, trigonous, smooth.
• Leaves basal, few; blades linear, to 18 cm by 1.5-2.5 mm, flat, scabrid on upper margins; sheaths light strawcolored to whitish brown; ligule a fringe of hairs.
• Inflorescence decompound, loose, 3-6 cm by 3-6 cm; involucre bracts 3-4, lowest leafy, to 4 cm long; primary branches 2-5, unequal, 1-5 cm long, scabrous above. Spikelets many per inflorescence, solitary, lanceolate, 2-4 mm by1-1.2 mm, acute, slightly angular, subloosely 5- 10-flowered, rusty-brown.
• Glumes many per inflorescence, spiral, ovate, 1-1.2 mm long, mucronate, membranaceous, light rusty-brown with pale-brownish margins; keel 3-nerved. Stamens 1-2, anthers 0.2-0.3 mm long. Style triquetrous, glabrous, dilated at base; stigmas 3. Achenes obovate, 0.5-0.7 mm by 0.3-0.4 mm, subsessile, light straw-colored, smoothish or with scattered verrucles, weakly cancellated with transversely oblong cells.

分布

• 台灣 : Open wet places.
• 世界 : India, Malesia, northern Australia and Queensland.

引證標本

TAICHUNG: Tsolungpu, Hsu 9150.

引用文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 271. 2000.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)