AVENE.E. 379 



hairs at the base, 6 mm. long, the awn 6-8 mm. long, starting two- 

 thirds the way from the base; palea 5 mm. long; upper floret 1 mm. 

 shorter, the awn also shorter. 



Washington (Mt. Stuart, altitude 7000-8000 feet), Sandberg 

 and Leihig. 



11. T. montanum Vasey, Bull. Torr. Club, 13: 118 (1886). 

 Culms -40-70 em. high, smooth. Leaves of sterile shoots 15-25 



cm. long, the upper sometimes eqiialling the panicle, slightly 

 scabrous. Panicle 10-15 cm. long, loose, open, rays in clusters of 

 three to five, 1-4 cm. long, flower-bearing nearly to the base. 

 Spikelets 2-flowered besides a hairy pedicel 1.5 mm. long, first 

 glume lanceolate, 4 mm. long, 1-nerved; second ovate-lanceolate, 

 over 5 mm. long, 3-nerved; floral glume linear-lanceolate, bearing 

 short hairs at the base, over 5 mm. long, obscurely 5-nerved, ter- 

 minating in two slender set^e, the awn diverging when dry, 3-5 mm. 

 long, starting two-thirds of the distance from the base; palea linear, 

 4.5 mm. long, 2-toothed. 



This has been mistaken for an open-panicled form of T. sui- 

 spicatum. 



Colorado, Vasey for U. S. Dept. Agricul. 



Colorado to New Mexico. 



12. T. cernuum Trin. Mem. Acad. St. Petersb. (VI) 1 : 61 (1831). 

 Avena cernua Kunth, Enum. PI. 1: 306 (1833). 



Culms slender, 30-90 cm. high, blades flat, 15-20 cm. long. 

 Sheaths smooth or pubescent; blades flat, 15-20 cm. long, 5-10 mm. 

 wide. Panicle very open, slender, nodding, 12-24 cm. long, 

 rays in distant clusters, capillary. Spikelets 2-3- (rarely 4-) flow- 

 ered, 6 mm. longer longer, rachilla bristly hairy; empty glumes 

 much shorter than the florets, first lanceolate-subulate, 1-nerved, 

 about 3 mm. long, second oval, abruptly pointed, over 4 mm. long; 

 floral glume firm, scabrous, with a few hairs at the base, oval- 

 lanceolate, obscurely 5-nerved, bearing a bent awn once or twice its 

 length; palea short with two hispid keels. Grain 3 mm. long with 

 a spongy hairy apex. 



Washington, Lake, Suhsdorf for U. S. Dept. Agricul. 425, 

 Sandberg. 



