Coarse rhizomatous perennial; culm tall, rooting at basal nodes; ligules membranous, deltoid, 15 mm long; leaf-blades broadly linear, 30-100 cm long, 1-3 cm wide, upper surface scabrous; midrib ridged on lower surface, whitish. Panicle large, conical-ellipsoidal; up to 60 cm long, upper branches contracted and bearing pistillate spikelets and the other branches with staminate spikelets. Pistillate 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 the lemma, 3-nerved. Caryopsis linear-oblong, 1 cm long. Staminate spiklets 1 cm long; glumes minute; lemma lanceolate, 5-nerved, acute or short-awned at apex. stamens 6, anther 4-10 mm long.
TAOYUAN: Taoyuan, Suzuki s. n. Oct. 24, 1934. CHIAYI: Chiayi, DeVol 7295. TAINAN: Guan-tien, Kuoh s.n. PINGTUNG: Tsutien, Hsu 527.
Eastern Siberia, Japan, China, and Indo-China.
Cultivated in swampy fields and the young shoots, swollen by infection with Ustilago edulis, are a vegetable in China.
midrib 中肋: (aq)aquatic:with air chamber, vascular bundles unequal
leaf surface 表面: (sha)upper surface with shallow notch between the veins
sclerenchyma 厚壁組織: (boscl)(bostr)on both sides of veins as strand or girder
chlorenchyma 葉綠組織: (armed)compact armed cells
bundle sheath 維管束鞘: (nks)bundle sheaths with small amount of chloroplast
buliform cells well developed 泡狀細胞發達: mainly appear in adaxial side
no small vein under buliform cells泡狀細胞下無小脈: (fanfu)bulliform set fan shaped, cells similar in size
chlorenchyma cell number between two adjacent veins: 7
chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (lit)with a little of chloroplast
mestome sheath 內束鞘細胞: (Xyms+)metaxylem pole adjacent with mestome sheath
distance between two adjancent vein 脈間距: 200 micrometer
length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 3
chlorenchyma cell shape in LS 葉綠細胞縱面形狀: lobed
