生活型

herb

形態特徵

• Culms ascending, pubescent, hairs whitish, 4-5 mm long; internodes longer than sheath, extra-sheath branching, rooting at nodes.
• Leaf sheath 4-8 cm long, pubescent, hairs whitish, 4-5 mm long; ligule 2-3 mm long, apex truncate, blade lanceolate, apex and base acute, to 10 cm long, 1-1.8 cm wide, pubescent on both surfaces, hairs ca. 1 mm long, margin scabrid.
• Inflorescence apical, 5-10 racemes, digitately arranged, constricted to spreading, purple-reddish, to 10 cm long; rachis ca. 2/3 length of sessile spikelet. Spikelets paired, pedical of upper spikelet half length of sessile spikelet, ca. 2 mm long, coated with hispid, hairs purple-reddish. Lower glume ellipse to ovate, apex obtuse, 2-keeled, ca. 4 mm long, keels ciliate, hairs purple-reddish; upper glume ovate, apex acute, boat-shaped, ca. 4 mm long, 1-3 nerved, central ridge scabrous. Lower floret absent, upper floret bisexual, upper lemma ovate, apex bifid, notched, hyaline, ca. 2 mm long, lobes 2/3 long of upper lemma length, one awn rising from the notch, awn 8-10 mm long, column 4-5 mm long; upper palea lanceolate to ovate, apex acute, upper margin ciliate, hyaline, ca. 2 mm long.
• Anthers 3, ca. 2 mm long; ovary ca. 0.7 mm long. Pedical spikelet similar to sessile spikelet, keel cilia on lower glume of pedical spikelet shorter than cilia of sessile spikelet; upper lemma’s awn shorter than sessile one, ca. 8 mm long.

分布

• 台灣 : two populations of this alien grass were found in low elevation, central Taiwan.
• 世界 : Africa and Asia.

引證標本

Nantou Hsien, Yuchih Hsiang, Shancha Lane, 22 Mar 2007, M.-J. Jung 1591 (z032201) (HAST, NCKU, TAIF), Shuishe, 5 Mar 2008, M.-J. Jung 2435 (TAIF).

參考文獻

• Ming-Jer Jung, Chien-Wen Chen and Shih-Wen Chung, Taiwania 55(4): 412-416. 2010.