生活型

herb

形態特徵

• Annuals; culm weak, usually geniculate, nodes 3 or 4; ligule a ring a short hairs.
• Inflorescence an oblong panicle, 5-10 cm long, ciliated at axils of branches, glandular. Spikelets 4-8-flowered, ovate to elliptic-ovate, ca. 2 mm long; rachilla falling off successively downwards from top to base; glumes broadly ovate, membranaceous, 1-nerved, subequal; lower glume slightly smaller, ca. 2/3 as long as upper, falling off when mature; lemmas keeled, broadly ovate, ca. 1 mm long, 3-nerved; palea persistent, or tardily deciduous, long ciliate on keels, hairs rigidly spreading at maturity; anthers 3, ca. 0.3 mm long.
• Caryopsis ovoid, ca. 0.5 mm long.

分布

• 台灣 : This is one of the most common weeds in Taiwan.
• 世界 : Widely distributed in the tropics of the Old World.

引證標本

TAIPEI: NTU Campus, Hsu 390; Chinshan, Hsu 1297. ILAN: Ilan, Hsu 87. HSINCHU: Hsinchu, Shimada 408. TAICHUNG: Tatushan, Hsu & Kuoh 10768. CHANGHUA: Lukang, Kuoh 1625. NANTOU: Puli, Hsu 4608. CHIAYI: Chiayi, DeVol 7172. YUNLIN: Huwei, Hsu 469. TAINAN: Tainan, Hsu 285. KAOHSIUNG: Kaohsiung, Hsu 1824. PINGTUNG: Fangliao, Hsu 961; Hsutzoliao, DeVol 7303* TAITUNG: Malan, Hsu 998; Tawu, Hsu 1023; Lanyu Is., Liu et al. 175; Lutao Is., Sasaki 420028. HUALIEN: Tienhsiang, Hsu & Hsu 3718.

引用文獻

• HSU, Chien-Chang, Flora of Taiwan, second edition 5: 416. 2000.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)