生活型

herb

形態特徵

• Perennial with short woody rhizome clothed with brown fibers. Culms solitary or few together, erect, 20-70 cm tall, triquetrous, smooth, leaved at more or less thickened base.
• Leaves several, shorter than culm; blades narrowly linear, 5-7 mm wide, herbaceous, flattish plicate; sheaths pale green and stained with purplish pink.
• Corymbs simple, open, with short rays, sometimes nearly head-like; rays 6-10, 0-5 cm long, each terminated by a cylindrical or oblong, spike narrowed to base, 1.5-3 cm long, 8-12 mm wide, greenish, densely bearing many spikelets; leafy bracts 4-10, lower few surpassing corymb. Spikelets patent to erect-patent, linear-lanceolate, subterete, 4-6.5 mm long, ca. 1 mm thick, bearing 4-7 glumes and 2 or 3 achenes; rachilla with lanceolate wings, jointed above prophyll.
• Glumes tightly erect, elliptic to oblong-elliptic, 3-3.5 mm long, inrolled, membranaceous to thinly chartaceous, obtuse or suddenly acute at apex, glaucous green and eventually tinged with straw-brown, 3- or 4-nerved on both sides, green keel convex. Achenes linear-oblong, trigonous, ca. 2/3 as long as glume, brown, minutely granulate; style slightly longer than achene; stigmas 3. Stamens 3.

分布

• 台灣 : Open grassy places on hillsides.
• 世界 : From India to Malesia and northern Australia, extending northwards to southern China and the Ryukyus.

引證標本

TAIPEI: Keelung, Suzuki 6818; Tamshui, Faurie 185; Yangminshan, 4408; Peitou, Faurie 79. ILAN: Choutou, Kuoh 2392. MIAOLI: Tahu, Wang 70. NANTOU: Lushan, Hsu 11545. PINGTUNG: Nanjenshan, Kuoh 4114. TAITUNG: Chihpen, Koyama 13073, Tagawa 1072; Lanyu Is., Kuoh 4946; Sasaki s. n. 20 Sep 1933.

引用文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 290. 2000.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)