生活型

herb

形態特徵

• Perennial with short, woody rhizome; culms solitary or sometimes tufted, 20-80 cm by 0.8-2 mm, obtusely 3-4-angular, smooth.
• Leaves basal, many; blades linear, to 40 cm by 2-5 mm, rounded, flattish, pale green to rust brown, scabrous on upper margins; sheaths to 5 cm long, rounded on back, pale-green to rust-brown, truncate at orifice; ligule a dense fringe of short hairs.
• Inflorescence compound or decompound, subloose, 5-12 cm by 4-8 cm; involucre bracts 2 or 3, leaf-like, 1-8 cm long; primary branches 2-5, unequal, patent, 0.7-6 cm long. Spikelets solitary, ovate-oblong to oblong, 5-8 mm by 2-3 mm, subacute, 6-17- flowered.
• Glumes 6-17 per spikelet, spirally imbricated, ovate, 2.5-4 mm by 2-2.5 mm, acute to mucronate, characeous with membranaceous margins, chestnut-brown; keel 5-9-nerved. Stamens 3; anthers ca. 2 mm long. Style triquetrous, glabrous, dilated at base; stigmas 3. Achenes obovate, 1.5-2 mm by 0.8-1.2 mm, cuneate at base, whitish yellow, cancellated with several rows of transversely oblong epidermal cells, bearing scattered verrucles especially toward apex.

分布

• 台灣 : occasional on grassy hillsides to 1,500 m.
• 世界 : India, Indochina, Malesia, southern China and the Ryukyus.

引證標本

TAIPEI: Sanshihkyaku, Odashima 493.

引用文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 279. 2000.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)