生活型

herb

形態特徵

• Stem floating on water, nodes pubescent.
• Blade lanceolate-linear, 3-6 cm long, 2-4 cm wide, with a petiole of ca. 1 mm long, membranaceous, erose. Panicle 6-14 cm long, branches stiff, extending beyond spikelet into a bristle of 6-10 mm long.
• Spikelets hispid, lanceolate, 5-7 mm long, solitary on pedicel of ca. 0.5 mm long; lower glume truncate or rounded, hyaline, ca. 0.5 mm long; upper glume 5-7 mm long, acuminate, hispid on veins; lower lemma slightly shorter than upper glume, veins ca. 13, obscure, acuminate, enclosing a lower palea and a staminate flower; upper lemma pistillate 1.6-1.8 mm long, membranaceous; anther ca.1 mm long.
• Caryopsis much exceeding upper floret when mature.

分布

• 台灣 : growing in shallow water or floating on deep water.
• 世界 : India, Sri Lanka, Myanmar. Indochina, Malesia, northern Australia, China and Japan.

引證標本

TAIPEI: Neihu, Masamune 2460. TAINAN: Hsinhua, Hsu 614.

參考文獻

• HSU, Chien-Chang, Flora of Taiwan, second edition 5: 505. 2000.  (Fl. Taiwan 2nd edit.)