生活型

herb

形態特徵

• Tufted, perennial, erect or geniculate, rooting in the geniculate nodes.
• sheath glabrous, slightly shorter than the internode, margin ciliate, cilia ca. 1 mm long, sheath collar pilose, hairs to 2 mm long; ligule a row of hairs, ca. 0.25 mm long; leaf blade linear, adaxial surface glabrous to pubescent, abaxial surface glabrous, strongly nerved with central and/or lateral veins, 10-20 cm × 4-6 mm.
• Panicle open, branch axils pilose, hairs to 1.5 m long. Spikelet disarticulating from the base upward, linear, strongly laterally compressed, with a jagged outline. Lower glume ovate-lanceolate, 0-nerved, ca. 0.3 mm long, apex acuminate; upper glume lanceolate, ca. 0.7 mm long, apex acute. Rachilla as long as the palea. Lemma deciduous at maturity, lanceolate, 1-3-nerved, ca. 2 mm long, apex acuminate; palea persistent, elliptic, keels glabrous, 1.5-2 mm long, apex obtuse; anthers 3, 0.2-0.5 mm long.
• Caryopsis ellipsoid, strongly flattened, rectangular in cross-section, dorsally grooved, 0.8-1.2 mm long, surface reticulate, apex obtuse; embryo nearly half as long as the caryopsis.

分布

• 世界 : native to Indochina, southern Asia, Madagascar, and Tropical Africa, and was introduced elsewhere, e.g. in Mexico, Australia, Malesia, New Guinea, Philippines, and Southern America, and Hawaii.

引證標本

Taipei City, Da-Jia Riverside Park, M.-J. Jung z050502. Hsinchu City, Nan-Liao Old Port, M.-J. Jung z041208; Shih-Pa-Chien-Shan, M.-J. Jung z050201; Qing-Cao-Hu, M.-J. Jung z050205. Hsinchu Co., Bao-Shan Town, Bao-Shan Reservoir, M.-J. Jung z050206. Miaoli Co., Da-Hu Town, Da-Ging-Fuo Temple, G.-I. Liao et al. s.n. (NCKU); Nan-Hu, M.-J. Jung z043001; Wen-Shuei, M.-J. Jung z043002; Gong-Guan Town, Fu-Ji, M.-J. Jung z043003; Nan-Juang Town, Nanjuang, M.-J. Jung z062104; Tai-An Town, Hushan, M.-J. Jung z062105; Meiyuan, M.-J. Jung z063004; Shihlin, M.-J. Jung z063005; Tong-Luo Town, Chu-Tzen, M.-J. Jung z070103; Jiuhuashan, M.-J. Jung z012804; Tong-Siao Town, Wu-Mei, M.-J. Jung z071009. Taichung Co., Chin-Shui Town, Ao-Feng Park, M.-J. Jung z041303; Heping Town, Wuling Farm, M.-J. Jung z051005; Tung-Shih Town, Dong-Ken, along the Dasyueshan Forestry Road, M.-J. Jung z052901; Tungshih Riverside Park, M.-J. Jung z052905. Tainan City, Tzu-chiang Campus in NCKU, M.-J. Jung 357 (NCKU).

參考文獻

• Ming-Jer Jung, Jan Frederik Veldkamp and Chang-Sheng Kuoh, Taiwania 53(1): 100. 2008.