196 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 



The only species found in the United States is Cathestecwn erec- 

 tum Vasey and Hack. (fig. 116), a stoloniferous perennial with the 

 aspect of Bouteloua texcma but more delicate. This species is known 

 in western Texas from a very few collections, but is more common 



FIG. HG.Cathestecum erectum. Plant, X I ; group of spikelets (reduced spike), central 

 spikelet, and fertile floret, X 5. 



in northern Mexico. Cathestecum is placed by Bentham 1 doubt- 

 fully in the tribe Zoysieae, and by Hackel 2 in the tribe Festuceae. 

 Griffiths 3 shows its affinity to Bouteloua and places it in the tribe 

 Chlorideae. 



1 Benti-. and Hook. Gen. PI. 3: 1122. 1883. 

 2 Engl. and Prantl, Pflanzenfam. 2 2 : 65. 1887. 

 3 Contr. U. S. Nat, Herb. 14: 358. 1912, 



