102 



Fig. 96.- ORYZOPSIS MICRANTHA iTrin. ct Rupr.j Thurb. in Gray, Proc. 

 Acad. Nat. .<ei. Phila. 1863 : 7s. 1^63. ( I'mchne //a'craH^/iO Trin. &Rupr. Agros- 

 tidea. 3 : 16. Ib42.) SMALL-FLOWERED MOUNTAIN RICE.— A slender, erect 

 perennial, usually about 6 dm. (2^) high, ^vith narrow leaves and small- 

 flowered open panicles 8-16 cm. (3'-6'j long. Lower branches of the panicle 

 2-5 cm. (l'-2') long, flower-bearing above. Spikelets 2-2..5 mm. (l"-li") long; 

 emptv glumes {a, c) broadly ovate, acute, nearly equal, a little longer than the 

 glabrous flowering glume (&); awn slender, 6 mm. (3") long.— Woods, river 

 bluffs, and mountain sides, South Dakota to Nebraska, Colorado, New Mexico, 

 and Arizona. June to August. 



