Oplismenus undulatifolius (Ard.) Roem. & Schult.
Annuals; culm branching and rooting at lower nodes, 10-30 cm long. Blade lanceolate to narrowly
ovate, acuminate, 3-7 cm long, 1-1.5 mm wide, near glabrous to hairy; sheath shorter than internode;
ligule very short. Inflorescence 6-12 cm long; racemes 6-10; spikelets 1-30 per raceme, fascicled, rarely
rachis to 15 mm long. Spikelets ca. 3 mm long, rounded, shortly hairy, narrowly ovate, subsessile; lower
glume broadly lanceolate, 1/2 as long as spikelet, bearing an erect awn; upper glume 2/3 as long as
spikelet, broadly ovate, shortly awned, 5-7-veined, membranaceous; upper lemma pale, smooth, coriaceous,
shiny, acute, ca. 2.7 mm long.
TAIPEI: Kankou, Hsu 629; Kuanyingshan, Hsu 366. TAICHUNG: Nankanchi, Hsu 566; Sungmao, Hsu 8749.
NATOU: Chitou, Hsu 3274. CHIAYI: Yushan, Suzuki 379. PINGTUNG: Nanjenshan, Hsu 7803. TAITUNG: Chinshuiying,
Shimizu 3833. HUALIEN: Tailuko, Suzuki 10016.
The warm temperate regions of Asia and Europe. Taiwan, in lowland forest.