196 BULLETIN 772, IT. S. DEPARTMENT OF AGRICULTURE. 
The only species found in the United States is Cathestecumi erec- 
tum Vasey and Hack. (fig. 116), a stoloniferous perennial with the 
aspect of Boutelcma texcma but more delicate. This species is known 
in western Texas from a very few collections, but is more common 
Fig. 116. — 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. 
iBenth. and Hook. Gen. PI. 3: 1122. 1883. 
2 Engl, and Prantl, Pflanzenfam. 2 2 : 65. 1887. 
3Contr. U. S. Nat. Herb. 14: 358. 1912. 
