大屯求米草

Orthopogon aemulus R. Br., Prod. Fl. Nov. Holl. 194. 1810.
Oplismenus Myanmarnnii (Retz.) P. Beauv. var. intermedius Honda, Bot. Mag. (Tokyo) 38: 191. 1924.
Oplismenus compositus (L.) P. Beauv. var. intermedius (Honda) Ohwi, Acta Phytotax. Geobot. 11: 35. 1942; Hsu, Fl. Taiwan 5: 565. 1978.
Orthopogon flaccidus R. Br., Prod. Fl. Nov. Holl. 194. 1810.
Oplismenus compositus (L.) P. Beauv. var. flaccidus (R. Br.) Domin, Biblioth. Bot. 85:328. 1915; Schulz, Phan. Monogr. 13: 80. 1981.

Annuals; culm to 1 m long, decumbent and rooting at lower nodes, 15-40 cm tall. Blade lanceolate, 3-9 cm long, 8-20 mm wide, more or less papillose-pilose, margins scabrous; ligule hyaline, truncate, ciliate above. Inflorescence of racemose racemes, 7-15 cm long; racemes 6-10, with densely-crowded spikelets, central axis hairy, 0.5-3 cm long. Spikelets narrowly ovate, 2-4 mm long; glumes subequal, 1.5-3.5 mm long, awned, awn of lower glume 2-9 mm long, that of upper glume 0.2-1.9 mm long; lower lemma exceeding glumes, 3-4 mm long, awnless or nearly so, usually enclosing a narrow hyaline pale of ca. equal length to lower lemma; upper lemma smooth and shining, 2.5-3 mm long, apex with a minute laterally compressed crest.

KEELUNG: Keelung, Hsu 394. TAIPEI: Yangmingshan, Hsu 97. TAITUNG: Tawu, Hsu 329.

Tropics. Taiwan, in shady places.