305 



Fig. 299. AQROPYRON SCRIBNERI Vasey, Bui. Torr. Bot. Club, 10 : 128. 

 1893.— A densely cfespitose perennial 2-5 dm. (8'-20') high, with ascending 

 culms, flat leaves, and bearded spikes 5-7 cm. (2'-3') long, which readily 

 break up at maturity. Leaf-blades 2-3 em. (I'-l^') long, 2-4 mm. (l"-2") wide, 

 rigid, attenuate-pointed; ligule obsolete. Spikelets (a) 3 to 6 flowered, the 

 empty glumes linear-lanceolate, extended above into a long point, 1-2 cm. 

 (i'-l') long; flowering glumes oblong-lanceolate 8-10 mm. (4"-5") long, exclu- 

 sive of the spreading or recurved hispid awn.— Summits of mountains, alt. 

 1,800-4,200 m. (5,800°-14, 000°).— Montana to Colorado and Arizona. August. 

 20801— No. 7 20 



