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



extending much beyond the first two. % — Dry open ground, 

 Cameron County, Tex. ; Paraguay and Argentina. 



3. Leptochloa virgata (L.) Beauv. (Fig. 1012.) Perennial; culms 

 wiry, erect, 50 to 100 cm tall; blades flat; racemes several to many, 



Figure 1011.— Leptochloa chioridiformis. Panicle, X 1; floret, X 10. 

 (Silveus 622, Tex.) 



slender, laxly ascending, 5 to 10 cm long, the 

 lower distant, the others often aggregate; spike- 

 lets nearly sessile, mostly 3- to 5-flowered; 

 lemmas 1.5 to 2 mm long, awnless or the lower 

 with a short awn. % — Open ground and grassy 

 slopes, southern Florida and southern Texas; 

 tropical America. 



4. Leptochloa domingensis(Jacq.)Trin. (Fig. 

 1013.) Resembling L. virgata; sheaths and blades 

 sparsely pilose ; panicle more elongate, the race- 

 mes shorter and more numerous; lemmas ap- 

 pressed-pubescent on the internerves, awned, 

 the awn of the lower florets 1 to 3 mm long. % 

 — Open ground and grassy slopes, southern 

 Florida; tropical America. 



5. Leptochloa filiformis (Lam.) Beauv. Red 

 sprangletop. (Fig. 1014.) Annual ; the foliage and panicles often red- 

 dish or purple ; culms erect, or often branching and geniculate below, 

 40 to 70 cm tall, or often dwarf; sheaths papillose-pilose, sometimes 

 sparsely so ; blades flat, thin, as much as 1 cm wide ; panicle somewhat 

 viscid, of numerous approximate slender racemes 5 to 15 cm long, on 



