生活型

herb

形態特徵

• Rhizome short, stout. Culms robust, loosely tufted, 60-150 cm tall, 4-10 mm thick, 3-angled.
• Leaves distributed throughout culms; leaf-blades elongated, overtopping culm, 5-18 mm wide, deep green, coriaceous, scabrid, gradually attenuated above to a long acute apex; sheaths 10-16 cm long, tightly surrounding culm internode, greenish to reddish brown.
• Inflorescence a compound panicle, interrupted below and contiguous above, occupying upper 1/2 to 1/3 of culm; partial panicles 5 to 8, elliptic to oblong, 5-25 cm long, 3-5 cm wide, single at each node, further branched into 5 to 20 spikes. Lower bracts leaf-like, overtopping inflorescence, sheathing base 2-7 cm long; bracteoles scaly, red-brown. Spikes cylindrical, 2-6 cm long, androgynous; pistillate part usually longer than staminate part, subdensely many-flowered; staminate part linear.
• Pistillate glumes ovate to elliptic, 2.5-3.5 mm long, 1.8-2.2 mm wide, acutish or obtusish at apex, straw-colored, glabrous or hispidulous, awned or awnless. Utricles ellipsoid to subglobose, 3.5-4.2 mm long, 1.75-2.5 mm wide, strongly inflated, spongy, distinctly 6-8-nerved, red when mature, abruptly contracted at both ends; beak short, recurved, bidentate. Achene loosely enveloped, elliptic, 2.75-3 mm x 1-1.2 mm, 3-angled; style short; stigmas 3.

分布

• 台灣 : open forest at low to mid elevations.
• 世界 : Sri Lanka, India, the Himalaya, southern China, and southeastern Asia.

引證標本

TAIPEI: Sanhsia, Peng 6244. TAOYUAN: Hsiayun to Hsiayunping, Peng 10292. HSINCHU: Litungshan, Wang & Lin 1917. TAICHUNG: Tahsueshan, Kuoh 10572. NANTOU: Wushe, Wu 10920. CHIAYI: Sanchaunanshan, Chang 10202. KAOHSIUNG: Shanping, Kuoh 15456. PINGTUNG: Chinshuiying, Leong 1461. HUALIEN: Fuyuan, Wang 15376.

引用文獻

• KOYAMA, Tetsuo, KUOH, Chang-Sheng & LEONG, Wai-Chao, Flora of Taiwan, second edition 5: 200. 2000.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)