534 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figuee 774. — Bouteloua curtipendula. Plant, X X A; spikelet and florets, X 5. (Chase 5408, Colo.) 



Bouteloua aristidoides var. ari- — Mesas and deserts, southern Ari- 

 zonica Jones. Spikes arcuate, to 2.5 zona and northern Mexico, 

 cm. long, with 5 to 10 spikelets. O 2. Bouteloua uniflora Vasey. (Fig. 



