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



the lateral pedicels 2 to 3 mm long; glumes acute, the first narrow, 

 scarcely 1 mm long, the second a little longer and wider; lemmas 1.6 

 to 1.8 mm long, acut- 

 ish. o — Dry soil, 

 Arkansas and Texas 

 to Arizona and central 

 Mexico. 



30. Eragrostis hir- 

 suta (Michx.) Nees. 

 (Fig. 316.) Perennial; 

 culms erect, tufted, 50 

 to 120 cm tall; sheaths 

 hirsute to glabrous, 

 pilose at the throat 

 and especially along 

 the collar at each side ; 

 blades flat, elongate, 5 

 to 10 mm wide, becom- 

 ing more or less invo- 

 lute, tapering to a fine 

 point, scabrous on the 



upper surface; panicle diffuse, more than half the 

 entire height of the plant, pilose in the axils, 

 5 times; spikelets on long 

 flexuous pedicels, 

 ovate to ovate- 

 oblong, 2- to 6-flow- 

 ered (rarely to 8-flow- 

 ered), 3 to 4 mm long; 

 glumes acuminate, 1.5 and 

 2 mm long; lemmas rather 

 turgid, 2 mm long, acute, 



the nerves obscure; grain oblong, 1 mm long, 

 minutely striate and pitted. % — Dry soil, 

 fields and open woods, Maryland to Missouri, 

 Pigube 316.— Eragrostis hir- south to Florida and eastern Texas; introduced 

 x*io. ^cSsslm^K in Maine and Massachusetts (fig. 317). 



Figure 314.— Eragrostis 



Figure 315.— Eragrostis arida. Panicle, 

 X 1; floret, X 10. (Type.) 



suaveolens, X 

 (Hitchcock 3812, 

 Mex.) 



branching 4 or 



Figure 317.— Distribution of 

 Eragrostis hirsuta. 



Figure 318.— Eragrostis lugens. Plant, X 1; floret, X 10. (Reverchon 16, Tex.) 



31. Eragrostis lugens Nees. (Fig. 318.) Perennial; culms tufted, 

 rather wiry, sometimes geniculate below, sparingly branching; sheaths 



