生活型

herb

形態特徵

• Culms ascending, internodes glabrous, nodes pilose, hairs 1-1.5 mm long.
• Leaf sheath longer than internodes, sparsely shortly pilose, hairs to 0.5 mm long; ligule membranous, apex obtuse, membranous, margin ciliate; blade linear, adaxial surface long-hispidulate, hairs 2-4 mm long, abaxial surface shortly pilose, hairs to 0.5 mm long.
• Raceme 2-6, apical, spikelets paired, sessile spikelet dorso-ventral compressed, shortly pedicelled, pedicel ca. 1.2 mm long, glabrous, lower glume ovate, apex truncate, bifid, keeled, unwinged or slightly winged on keels, 11-13-nerved, coriaceous, ca. 4.5 mm long; upper glume lanceo-ovate, 5-nerved, glabrous on surface, ca. 5.2 mm long, apex acuminate to truncate, awned, awn rising from apex, awn to 1 mm long; first floret staminate, lemma obovate, apex acute, 3-nerved, ca. 4.8 mm long, margin membranous, reflexed, slightly ciliate, palea obovate, 2-nerved, glabrous on veins, intercostal region lanceolate, herbaceous to coriaceous, margin membranous, anther 3, ca. 2.3 mm long; second floret pistilate, with abort stamens, lemma ovate, 3-nerved, membranous, apex acute, awned, awn to 4.5 mm long, rising from apex, palea lanceo-ovate, apex acute, membranous, 2-nerved, glabrous on veins. Pedicelled spikelet laterally compressed, pedicel ca. 3.5 mm long, pilose, lower glume ovate, apex acuminate, coriaceous, ca. 4.8 mm long, 9-11-nerved, keeled on central vein, unwinged, upper glume lanceo-ovate, 5-nerved, glabrous on surface, ca. 5.2 mm long, apex acuminate to truncate, awned, awn rising from apex, awn to 1 mm long; first floret staminate, lemma obovate, apex acute, membranous, 3-nerved, ca. 4.3 mm long, palea lanceo-ovate, apex truncate, membranous, 2-nerved, glabrous on veins, anther 3, ca. 2 mm long, second floret pistillate with abort stamens, lemma ovate, membranous, apex acute to obtuse, 3-nerved, base oblique, apex awned, awn to 3 mm long, rising from apex, palea lanceo-ovate, apex acuminate, bifid, membranous, ca. 3.5 mm long, 2-nerved, glabrous on veins.

分布

• 台灣 : in dasheen paddy field in Lanyu Island, Taitung Co., south-eastern Taiwan
• 世界 : native to Asia and Pacific Islands, and introduced to Africa and America.

引證標本

Taitung Co., Lanyu Township, Yeyou, 20 Oct 2008, M.-J. Jung 3595 (TAIF).

引用文獻

• Hildemar Scholz, Chien-Wen Chen and Ming-Jer Jung, Taiwania 54(2): 170. 2009.