MANUAL OF THE GRASSES OF THE UNITED STATES 



481 



flexed. % — Sterile soil, South 

 Carolina, Florida, and Alabama. 



38. Aristida tenuispica Hitchc. 

 (Fig. 709.) Perennial; culms slender, 

 60 to 100 cm. tall; blades flat, 10 to 

 20 cm. long, 1 to 2 mm. wide, bearing 

 scattered long hairs on the upper sur- 

 face; 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. Ql — 

 Low pine barrens, peninsular Florida; 

 British Honduras. 



39. Aristida condensata Chapm. 

 (Fig. 710.) Perennial; culms rather 

 robust, a meter or more tall; lower 

 sheaths usually appressed pubescent; 

 blades firm, flat, becoming involute, 

 elongate, 2 to 3 mm. wide; panicle nar- 

 row, as much as 30 cm. long, the 

 branches 5 to 12 cm. long, ascending, 



Figure 707. — Aristida 

 simpliciflora, X 1. 

 (Chapman, Fla.) 



Figure 708. — Aristida 

 mohrii, X 1. (Mohr 

 53, Ala.) 



Figure 706. — Aristida virgata, X 1. (Tracy 4667, 

 Miss.) 



closely flowered; glumes equal, 8 to 



9 mm. long; awns equal, divergent, 



10 to 15 mm. long, the base more or 

 less contorted, finally forming a loose 

 spiral. % — Sandy pine or oak 

 barrens, North Carolina, Georgia, 

 Florida, and Alabama, on the Coastal 

 Plain. Specimens with glabrous lower 

 sheaths have been differentiated as 

 A. condensata var. combsii (Scribn. 

 and Ball) Heur. 



40. Aristida gyrans Chapm. (Fig. 

 711.) Perennial; culms erect, slender, 

 40 to 70 cm. tall; blades involute, 10 

 to 15 cm. long, 1 mm. wide; panicle 

 slender, rather lax, 15 to 30 cm. long, 

 the branches appressed, not at all or 

 only slightly overlapping, bearing 

 mostly 1 to 3 spikelets; first glume 

 7 to 8 mm. long, the second 10 to 11 

 mm. long; lemma about 6 mm. long, 



