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Fig. 161. TRISETUM MONTANUM Vasey, Bui. Torr, Bot. Club, 13 : 118. 

 1886. ROCKY MOUNTAIN OAT-GRASS.— A slender, erect, or ascending native 

 grass 3-8 dm. (l°-2i°) high, Avith narrow, flat leaves and many-flowered, more 

 or less contracted panicles 8-12 cm. (3'-5') long. Leaves of the sterile shoots 

 15-25 cm. (6'-10') long, slightly scabrous. Spikelets (a) 2-flowered, the rachilla 

 hairy; first glume lanceolate -1 mm. (2") long, 1-nerved; second glume 5 mm. 

 (2i") lon^, 3-nerved; flowering glumes (6) linear-lanceolate, Avith few short 

 hairs at the base, about 5 mm. (21") long; awn diverging when dry 3-6 mm. 

 (li"-3") long.— Mountains of Colorado and New Mexico. July, August. 



