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



mm long, scarcely beaked; awns divergent, the central 1 to 1.5 cm 

 long, the lateral a little shorter. 91 Common in pine barrens, 

 North Carolina to Florida, west to Mississippi (fig. 984). 



31. Aristida rhizomophora Swallen. (Fig. 985.) Perennial; culms 

 tufted, erect, 65 to 80 cm tall, producing well developed scaly rhizomes; 

 blades firm, flat or folded, 7 to 10 cm long, 1 to 2 mm wide, those of the 

 innovations flexuous, as much as 30 cm long; panicle flexuous, 20 to 



FIGURE 978. Distribution of 

 Aristida fendleriana. 



FIGURE 979 Aristida lanosa, X 1. 

 (Canby, Md.) 



FIGURE 977. Aristida fendleriana, X 1. 

 (Coville 1089, Ariz.) 



FIGURE 980. Distribution of 

 Aristida lanosa. 



30 cm long, the distant branches somewhat spreading, few-flowered, 

 spikelet-bearing from near the base; glumes acuminate, usually awned, 

 the first 8 to 14 mm long, the second 12 to 17 mm long (including the 

 awn) ; lemma 9 to 12 mm long, the callus 1 mm long, the awns flexuous, 

 curved or loosely twisted at base, spreading, the central often reflexed 

 by a semicircular bend, 18 to 28 mm long, the lateral 15 to 20 mm 

 long. 21 Prairies, peninsular Florida. 



32. Aristida purpurascens Poir. ARROWFEATHER. (Fig. 986.) 

 Perennial : culms tufted from a rather thin weak sometimes decumbent 



