生活型

herb

形態特徵

• Perennials. Culms erect, 10-50 cm tall, 1-4 cm wide.
• Leaf blades herbaceous, flat, linear, 3-25 cm long, 4-10 mm wide, acuminate at apex, glabrous to slightly hairy on both surfaces. Leaf sheaths laterally compressed and keeled, glabrous to sparsely pilose. Ligule a fringe of hairs, 2-20 mm long.
• Inflorescence a dense and cylindrical panicle, 2-14 cm long, 0.5-2 cm thick. Spikelets solitary or clustered, sessile, surrounded by two whorls of bristles; bristles ciliate, the inner longer and thicker than the outer, with one conspicuously longer one. Spikelet with 2-florets, one base sterile (sometimes male) and one fertile, lanceolate, acute at apex, 2-5.5 mm long, moderately dorsally compressed. Lower and upper glumes similar, hyaline, ovate, glabrous, acute at apex, with equal length of spikelets, (3-) 5-nerved. Lemma and palea of fertile floret similar, chartaceous, 2-5 mm long, ovate, glabrous and shining. Anthers 3, 1.3-1.7 mm long. Stigma 2, plumose, terminally exerted.
• Caryopsis obovoid, 1-1.3 mm long, glabrous, dorsally compressed.

分布

• 台灣 : Cultivated in Taiwan as a pasture grass, escaped and naturalized in southern Taiwan.
• 世界 : Native to the Mediterranean region, Africa, Arabia, Canary Islands, Malagasy, Indonesia, northern India, and Pakistan. It was introduced to Australia, United States and Mexico as a pasture grass and had become an invasive weed.

引證標本

Kaohsiung: Tengchih, Chih-Hui Chen 4324 (TESRI); Linyuan, Ting-Yi Tzi 740 (NSYSU). Pingtung: Kenting, Chang-Sheng Kuoh t121503 (NCKU).

參考文獻

• Chih-Hui Chen and Chang-Sheng Kuoh, Taiwania 49(4): 232-236. 2004.