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



more than 2 mm wide; panicle slender, erect, though not very stiff, 

 rather loosely flowered, one- third to half the entire length of the culm ; 

 glumes about equal, 6 to 7 mm long ; lemma 4 to 5 mm long ; central 

 awn horizontally spreading or somewhat reflexed, 1.5 to 2 cm long, 

 the lateral awns erect, about two- thirds as long as the central. 91 

 (A. chapmaniana Nash.) Moist sandy soil of the Coastal Plain, New 

 Jersey to Florida and Texas (fig. 992). 



36. Aristida simpliciflora Chapm. (Fig. 993.) Perennial; culms 

 erect from a rather delicate base, slender, 30 to 60 cm tall; blades flat, 

 5 to 15 cm long, 1 mm wide; panicle slender, somewhat nodding, 10 



FIGURE 985. Aristida rhizomophora. Plant, X H; spikelet, X 2; two views of callus, X 10. (Type.) 



to 20 cm long, few-flowered, the spikelets mostly in pairs; glumes 

 equal, 6 to 7 mm long; lemma a little shorter than the glumes; central 

 awn finally reflexed by a semicircular bend, 1 to 1.5 cm long, the 

 lateral awns horizontally spreading, a little shorter than the central 

 one. 01 Moist pine woods, rare, western Florida; Mississippi 

 (McNeill). 



37. Aristida mohrii Nash. (Fig. 994.) Perennial; culms erect, 

 40 to 60 cm tall; blades flat or those of the innovations involute, 10 to 

 15 cm long, 1 to 2 mm wide, the uppermost reduced; panicle slender, 

 strict, as much as 30 cm long; spikelets solitary, appressed, distant, 



