PANICEAE 



41 



some value especially in the southern part of the State Is 

 the native Chaetochloa composita which has not yet reached 

 the dignity of a common name. Experiments in growing it 

 in the garden show that the seeds germinate rather readily 

 and the plant does well on the light dry soils of the mesas. 

 It is a short lived perennial producing an abundance of seeds 

 m a cylindrical spike which is somewhat like the foxtail 

 grasses but not so hairv. 



Tribe III. PANICEAE. 



Spikelets with involucres; involucre of two 

 spiny valves. 



Spikelets naked, i. e.. without involucres. 



Empty glumes awned. 



Empty glumes not awned. 



Spikelets in one-sided simple or branched 

 racemes. 



Spikelets ovate to orbicular, obtuse. 

 Spikelets lanceolate, acute to acuminate. 

 Spikelets in panicles or panicled racemes, 

 not 1-sided. 



A swollen ring at the base of the first 



glume. 

 Swollen ring wanting. 



Spikelets lanceolate, covered with long 



white hairs. 

 Spikelets mostly orbicular, sometimes 



lanceolate and pubescent, but 



never conspicuously white hairy as 



in 17. 



Flowering glume inrolled at the 



edges, thin; first glume always 



conspicuous. 

 Flowering glume not Inrolled, thick 



and leathery; first glume very 



small or wanting. 



11. Cenchrus. 



12. Chaetochloa. 



13. echinochloa. 



14. Paspalum. 



15. Syntherisma. 



16. Eriochloa. 



17. Valota. 



IS. Paxicum. 

 19. Leptoloma. 



