Tall coarse perennial tufted with short thick rhizome. Culm about 1-3 cm in diameter. Blades 2-4 cm wide, the margins scabrid; ligule 2 mm long, fimbriate on upper margin, siliceous on dorsal side; sheath usually longer than the internode, glabrous or subdensely pubescent (var. coleotricha Hackel). Panicle ample, 30-70 cm long, axiss strigose at nodes. Spikelets 3-4-flowered or more, terete, 10-15 mm long; glumes chartaceous, lanceolate, siliceous apex with short awn or acute; the lower glume about 12 mm long, 3-5-nerved, rarely 4-nerved, covered with a few silky hairs on the backside; the uppe glume about 10 mm long, 3-5-nerved; lemma 10-12 mm long, 5-nerved middle nerve prolonged into a 3 mm long awn, 2 lateral awn slightly cuspidate, basal part densely covered with long silky hairs which are nearly as long as the lemma; palea about 5 mm long, 2-keeled, the margins ciliate, apex truncate; lodicules 2, truncate, nerved, stamens 3. anther 2.5 mm long.
TAIPEI: Chinshan, Hsu 1288; Tanshui, Hsu & Kuoh 12399. MIAOLI: Taian, Hsu 548. TAICHUNG: Lishan, Fung & Kao 5002. PINGTUNG: Liukuaitso, Suzuki 5695. TAITUNG: Chipen, Hsu 973.
A form with striped leaves (var. versiocolor Stokes) cultivated in Taiwan and Japan.
[Distinguished by general appearance from two other large grasses with plumelike panicles: Neyraudia reynaudiana (Kunth) Keng., Burma reed or silk reed, and Phragmites australis (Cav.) Steud. The following characters will also separate the three: Phragmites has naked lemmas; Arundo has hairy lemmas and a naked rachilla; Neyraudia has naked lemmas and a hairy rachilla. All three species grow around canals.]
(Hitchcock, A.S. 1935; Radford et al. 1964; Huxley 1992).
leaf surface 表面: (fla)flat surface
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: (nke)bundle sheaths without chloroplast
no small vein under buliform cells泡狀細胞下無小脈: (bcnar)bulliform cell with colorless cells beneath it in row
chlorenchyma cell number between two adjacent veins: 8
chloroplast form in bundle sheath 束鞘細胞內之葉綠體型式: (not)no chloroplast
mestome sheath 內束鞘細胞: (Xyms+)metaxylem pole adjacent with mestome sheath
distance between two adjancent vein 脈間距: 140 micrometer
length/weidth ratio of bundle sheath in LS 束鞘細胞縱面長寬比: 2
chlorenchyma cell shape in LS 葉綠細胞縱面形狀: lobed