MANUAL OP THE GEASSES OF THE UNITED STATES 



517 



of rachilla joint, cleft nearly to the base, the intermediate lobes 

 broad, subcucullate, the awns of rudiment and fertile lemma reaching 

 about the same height, a second rudiment, broad and awnless, often 

 developed o (B. micro- 

 stachya L. H. Dewey.) 

 Open ground, mesas, and 

 rocky hills, Texas, New 

 Mexico, southern Utah, 

 Arizona, southeastern Cali- 

 fornia, Mexico (fig. 1093). 

 The awns vary in length. 

 The form with shorter awns 

 is that described as B. 

 pumila BuckL; the longer 

 awned form is that de- 

 scribed as B. arenosaV&sey. 

 11. Bouteloua parryi 

 (Fourn.) Griffiths. PARRY 

 GRAMA. (Fig. 1094.) 

 Annual, resembling B. roth- 

 rockii; culms erect or gen- 

 iculate-spreading, sometimes branching ; blades papillose-pilose; spikes 

 4 to 8, often flexuous, commonly grayish purple, 2 to 3.5 cm long; 

 rachis papillose-pilose; spikelets 40 to 65, about 6 mm long; second 

 glume awned from a bifid tip, the keel papillose-pilose with spreading 

 hairs; fertile lemma densely pilose, deeply cleft, the awns spreading, 



FlGURE m7 -~ 



Panicle> x 1; 



FIGURE 1088. Bouteloua radicosa. Pan- FIGURE 1089. Bouteloua filiformis. Pan- 

 icle, X 1; spikelet, X 5. (Griffiths 7181, icle, X 1; spikelet, X 5. (Griffiths 7199, 

 Ariz.) Ariz.) 



the oblong intermediate lobes fimbriate ; rudiment densely bearded at 

 summit of rachilla, cleft nearly to the base, the lobes obovate, fim- 

 briate, the awns exceeding those of the fertile lemma; a second rudi- 



