生活型

herb

形態特徵

• Coarse rhizomatous perennials; culm tall, rooting at basal nodes; ligules 7-20 mm long.
• leaf blade broadly linear, 30-100 cm long, 1-3 cm wide, upper surface scabrous; midrib ridged on lower surface, whitish.
• Panicle large, conical-ellipsoid; 30-60 cm long, upper branches contracted and bearing female spikelets and other branches with male spikelets. Female spikelets 1.5-2 cm long; glumes minute; lemma 5-nerved, lanceolate, scabrous on nerves, gradually narrowed at apex into a scabrous awn; palea lanceolate, as long as lemma, 3-nerved.
• Caryopsis linear-oblong, 1 cm long. Male spikelets 1 cm long; glumes minute; lemma lanceolate, 5-nerved, acute or short-awned at apex. Stamens 6, anthers 4-10 mm long.

分布

• 台灣 : Cultivated in swampy fields. The young shoots, which swollen by an infection of <i>Ustilago</i> edulis are used as a vegetable.
• 世界 : Eastern Siberia, Japan, China, and Indochina.

引證標本

TAOYUAN: Taoyuan, Suzuki s. n. 24 Oct 1934. CHIAYI: Chiayi, DeVol 7295. TAINAN: Guan-tien, Kuoh s. n. PINGTUNG: Tsutien, Hsu 527.

參考文獻

• HSU, Chien-Chang, Flora of Taiwan, second edition 5: 323. 2000.  (Fl. Taiwan 2nd edit.)