638 POACE^. 



Iowa, Hitchcock ; Colorado, Vasey, Cassidy, Jones; Montana, 

 Anderson 36 ; Texas, Nealley; Utah, Jones; New Mexico, Vasey; 

 Wyoming, Bvffum C 5, C 46, C 95; New Mexico, Vasey; Washing- 

 ton, Sandherg 310, 435, 466; Oregon, Howell; Arizona, Jones 4012. 



A native of the western plains from Texas to Montana, much 

 valued for hay. See Vol. I., pp. 92, 93. Also found in Europe 

 and Asia. 



5. A. divergens Nees, Steud. Syn. PI. Gram. 347 (1855). 

 Triticum strigosum hes. Linnaea, 9:170 (1834). 



A slender densely tufted glaucous perennial, 30-80 cm. high. 

 Leaves 3-4 in number, sheaths about the length of the internodes; 

 ligule very short; blades narrow, convolute, setaceous, nearly smooth, 

 the upper 4-8 om. long. Spikes 6-14 cm. long, very slender. Spike- 

 lets 3-6-flowered, rather distant, first empty glume 6 mm. long, 

 3-nerved, margins scarious, second 8 mm. long, 5-nerved, with the 

 midrib at one side, awnless; floral glume 7-8 mm. long, plainly 

 5-nerved above, awn stout, diverging or recurved when dry, 

 longer than the floral glume; palea about as long as its glume or 

 longer. 



Colorado, Cassidy; New Mexico, Vasey; Montana, Anderson 

 35, 40; Wyoming, Buffum C 94, C 97; Washington, Sandlerg 583, 

 Lake; Oregon, Howell, Gusick; California, Parish; Mexico, Pringle 

 1439. 



Eocky Mountains to the Paciflc. 



6. A. Scribneri Vasey, Bull. Torr. Club, 10: 128 (1883). 

 Culms densely tufted, geniculate and decumbent near the base, 



30-60 cm. high, rather slender. The upper sheath thrice as long 

 as the blade; ligule obsolete; blade 2.5-3.5 cm. long, involute, 

 narrow, rigid. Spikes exserted, 5-7 cm. long, their internodes 4-5 

 mm. long. Spikelets 3-6-flowered; empty glumes 5-7 mm. long, 

 linear-lanceolate, 3-5-nerved, extending into a long point, 10-25 

 jnm. long; floral glume oblong-lanceolate, tlie base about 8 mm. 

 long, smooth, 5-nerved, sometimes slightly bidentate, the mid- 

 nerve extended into a strong, spreading or recurved hispid awn; 

 palea equalling the floral glume, acute, margins hispid. The spike 

 resembles that of A. caninum, but the plant differs in its tufted 



