生活型

herb

形態特徵

• Perennial with short rhizome; culms densely tufted, 5-40 cm by 0.3-0.5 mm, compressed, sulcate, smooth.
• Leaves basal, few; blades linear, 2-16 cm by 0.5-1 mm, margins involute, spinulose-scabrous on upper margins, greyish green or glaucescent; sheaths 2-6 cm long, cinnamon brown; ligule a dense firnge of short hairs.
• Inflorescence a single, terminal spikelet, more rarelyor 1-3 lateral spikelets added; involucre bracts 1- 2, glume-like, lowest sometimes leafy, to 4 cm; primary branches 1-3 cm long when present, each terminated by a single spikelet. Spikelet ovoidal to ellipsoidal, 5-14 mm by 3-5 m, subterete, many-flowered.
• Glumes many per spikelet, spiral, ovate-orbicular, 3-3.2 mm by 2-3.5 mm, rounded, thinly chartaceous, membranaceous-margined, slightly shiny, several-nerved on obtuse back, scarcely keeled. Stamens 3; anthers 0.5-0.8 mm long. Style somewhat flattened, fimbriate above middle, slightly dilated at base; stigmas 2. Achenes obovate-orbicular, 1.2-1.5 mm by 1-1.1 mm, biconvex, shortly stipitate, maturing brownish, cancellated by isodiametrical hexagonal epidermal cells.

分布

• 台灣 : in open grassland and rice fileds and sometimes on forest floor.
• 世界 : India, Sri Lanka, Indochina, Malesia, northern Australia and southern China.

引證標本

TAIPEI: Shulin, Odashima 17828. TAOYUAN: Taoyuan, Simada 305. NANTOU: Wushe, Kudo & Sasaki 15650. TAINAN: Chiali, Morimoto 214. PINGTUNG: Ssuchungchi, Hsu 8088.

參考文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 274. 2000.  (Fl. Taiwan 2nd edit.)