14 BULLETIN 201, U. S. DEPARTMENT OF AGRICULTURE. 



BOUTELOUA PARRYI (Fourn.) Griff. 



Bouteloua parryi (hairy grama) never occurs in sufficient abundance to be a first- 

 quality grass, but it often furnishes half or more of the feed on small areas. It has 

 several more or less distinct habits, like many other species of the genus. In favorable 

 situations it may become 2 feet high, while in barren situations the whole plant may 

 not be over 2 or 3 inches tall. It is one of the most handsome grasses of the genus, of 

 good grazing quality, but of minor economic importance on account of its sparse growth. 



No. 7095 (E. 0. W.) was collected in the northern foothills of the Santa Rita Moun- 

 tains of Arizona, October 9, 1912. Its percentage of moisture was 3.49. Other con- 

 stituents (on a water-free basis) were as follows: Ash, 7.96; ether extract, 1.90; crude 

 fiber, 35.56; nitrogen-free extract, 48.58; protein, 6.00; pentosans, 26.13. 



BOUTELOUA ROTHROCKII Vasey. 



In some situations in southern Arizoza Bouteloua rothrochii (mesa grama) makes 

 almost pure stands over large areas of the gently sloping upper mesas, just below the 

 mountain foothills. It is especially abundant on the northern slopes of the Santa Rita 

 and Santa Catalina mountains. In favorable seasons it often yields a ton of hay to the 

 acre. It is a very handsome, tall species, growing rather thinly, but under protection 

 from overgrazing — as has been done in the Santa Rita Mountains — it has thickened up 

 wonderfully and crowded out the less valuable Bouteloua aristidoides and Aristida 

 bromides, which had gained ascendency. It does not stand trampling as well as some 

 of the other species of the genus and as a consequence does not yield abundantly to- 

 day in many situations where it formerly predominated. (PI. Ill, fig. 1.) 



No. 8592 was collected on the northern slope of the Santa Rita Mountains, Ariz., 

 September 27, 1906. The sample was taken after the plant had completely dried up, 

 but the seed had not yet shattered. Its percentage of moisture was 3.55. Other 

 constituents (on a water-free basis) were as follows: Ash, 6.53; ether extract, 1.58; 

 crude fiber, 36.67; nitrogen-free extract, 50.55; protein, 4.67; pentosans, 25.68. 



BROMUS CARINATUS HOOKERIANUS (Thurb.) Shear. 



Bromus carinatus hookerianus is rather coarse, tall brome-grass, which adds a great 

 deal to the feed in the region where the sample was collected. It grows scatteringly 

 and also often inhabits very limited areas to the exclusion of practically everything 

 else. It is regularly grazed by cattle in this section, even when old, and probably 

 does not differ materially in pasture value from some of the cultivated species, but 

 it has a decided advantage over the weedy introduced annuals which occupy the 

 greater part of the land in this region. 



No. 8302 was collected near Banning, Cal., May 15, 1906. The seed of the sample 

 was nearly mature. The culms were cut about 2 inches from the ground. Its per- 

 centage of moisture was 7.01. Other constituents (on a water-free basis) were as fol- 

 lows: Ash, 9.36; ether extract, 2.52; crude fiber, 29.20; nitrogen-free extract, 53.62; 

 protein, 5.30; pentosans, 24.28. 



BROMUS HORDEACEUS L. 



Bromus hordeaceus, a species of cheat, cultivated as a hay grass in some sections, is 

 an important introduced annual weed of California west of the Sierras. It makes a 

 fair quality of feed and is adapted for either pasture or hay. It does not possess the 

 disadvantageous characteristics of the tucolote and some of the other species. 



No. 7107 (Wooton) was collected at Red Bluff, Cal., April 7, 1913. No. 8315 was 

 collected near Santa Barbara, Cal., May 21, 1906. The sample was taken when the 

 seed was in the milk. It was cut close to the ground. 



