208 



Fig. 202. BOUTELOUA VESTITA (S. Wats.j Scribn. Contr. U. S. Nat. Herb. 

 2 : 531. 1894. {B. polystachya vestita S. Wats. Proc. Am. Acad. 18 : 177. 1883.) 

 HAIRY GRAMA. — A tufted annual, with erect or ascending slender culms 

 3-6 dm. (l°-2°) high, with short, flat leaves and two to eight ascending, many- 

 flowered, hairy spikes about 2 cm. (1') long. Leaves mostly flat, thinly jnibes- 

 cent. Spikelets 3.5-4.5 mm. (l^"-2y') long: empty glumes (a) unequal, the 

 first one-half as long as the awn-pointed second one, which slightly exceeds 

 the floret; flowering glume (7>) thinly pubescent below, the inner lobes the 

 larger, minutely ciliate; awns from the sinuses equaling or slightly exceeding 

 the glume. Palea (c) four-lobed, .short-awned. Rudiment (d) pilo.se-tufted, 

 bearing three awns equaling those of the flowering glume.— Sandy banks of 

 streams and "benches " on mountain sides, western Texas to southern Arizona. 

 (Mexico.) September, October. 



