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



even the upper not overlapping; glumes equal, firm, rather broad 

 toward the mucronate apex, 1 cm long; lemma terete, a little shorter 

 than the glumes; awns divergent, the central one reflexed by a semi- 

 circular bend near the base, 1.5 to 2 cm long, the lateral ones scarcely 

 shorter than the central, horizontally spreading or reflexed. 21 

 Known only from Spring Hill, near Mobile, Ala. 



38. Aristida tenuispica Hitchc. (Fig. 995.) Perennial; culms 

 slender, 60 to 100 cm tall; blades flat, 10 to 20 cm long, 1 to 2 



FIGURE 991. Aristida virgata, X 1. (Tracy 

 4667, Miss.) 



FIGURE 993. Aristida sim- 

 pliciflora, X 1. (Chapman. 

 Fla.) 



FIGURE 992. Distribution of Aristida virgata. 



mm wide, bearing scattered long hairs on the upper surface; 

 panicle slender, about half the entire length of the culm; glumes 

 nearly equal, about 8 mm long; lemma 7 mm long including a 1 

 mm long beak; awns equal, 12 to 15 mm long, spreading or 

 reflexed, somewhat spirally contorted at base. 01 Low pine 

 barrens, peninsular Florida. 



