196 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 
The only species found in the United States is Cathestecum. erec- 
tum Vasey and Hack. (fig. 116), a stoloniferous perennial with the 
aspect of Bouteloua texana but more delicate. This species is known 
in western Texas from a very few collections, but is more common 
Fie. 116—Cathestecum erectum. Plant, * 4; group of spikelets (reduced spike), central 
spikelet, and fertile floret, Xx 5. 
in northern Mexico. Cathestecum is placed by Bentham? doubt- 
fully in the tribe Zoysieae, and by Hackel? in the tribe Festuceae. 
Griffiths? shows its affinity to Bouteloua and places it in the tribe 
* Chlorideae. . 
1 Benth. and Hook. Gen. Pl. 3: 1122. 1883. 
2Engl. and Prantl, Pflanzenfam. 2?: 65. 1887. 
® Contr. U. S. Nat. Herb. 14: 358. 1912. 
