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



the callus 1.5 mm. long, sharp; awns 

 equal, divergent, 1 to 1.5 cm. long, 

 about equally contorted at base in 

 a loose spiral. 91 — Dry sandy 

 soil, Georgia and Florida. 



Figure 709. — Aristida tenuispica, X 1. (Tracy 7104, 

 Fla.) 



Figure 711. — Aristida gyrans, X 1. (Combs 1289, 

 Fla.) 



Figure 710. — Aristida condensate, X 1. (Chapman, 

 Fla.) 



TRIBE 6. ZOYSIEAE 



93. TRAGUS Hall. 

 (Nazia Adans.) 



Spikelets 1-flowered, in small spikes of 2 to 5, the spikes subsessile, falling 

 entire, the spikelets sessile on a very short zigzag rachis, the first glumes 

 small, thin, or wanting, appressed to the rachis, the second glumes of the 2 

 lower spikelets strongly convex with 3 thick nerves bearing a row of squarrose, 

 stout hooked prickles along each side, the 2 second glumes forming the halves 

 of a little bur, the upper 1 to 3 spikelets reduced and sterile; lemma and palea 



