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



mostly more than half as wide as long, branching 2 or 3 times, sparsely 

 pilose or glabrous in the axils; spikelets mostly 8- to 9-flowered, 5 to 10 

 mm long, 1.8 to 2 mm wide; lemmas 2.5 to 3 mm long, hyaline-mar- 

 gined toward summit, the tip erose. 21 Rocky hills, western Texas 



to New Mexico and northern Mexico. 



34. Eragrostis palmeri S. Wats. 

 (Fig. 321.) Perennial; culms tufted, 

 erect, about 70 cm tall; blades involute, 

 elongate, erect; panicle open, oblong, 15 

 to 20 cm long, 5 to 7 cm wide, glabrous 

 in the axils; spikelets 5 to 7 mm long, 

 mostly 7- to 9-flowered, brownish ; first 

 glume about 1 mm long; second glume 

 1.5 to 2 mm long; lemmas rounded on 

 the back, bronze-tipped, about 2 mm 

 long. QJ. Alkaline banks, Texas 

 (Harlingen) ; Mexico (Juarez, Coahuila). 

 Differs from E. erosa in the oblong pan- 

 icle and smaller spikelets and lemmas. 



35. Eragrostis intermedia Hitchc. 

 PLAINS LOVEGRASS. (Fig. 322.) Per- 

 ennial; culms erect, tufted, mostly 40 to 

 80 cm tall; sheaths glabrous or the 

 lowermost sparsely pilose, conspicuously 



pilose at the throat, the hairs extending in a line across the collar; 

 blades flat to subinvolute, pilose on the upper surface near the base, 

 otherwise glabrous or with a few scattered hairs, 10 to 25 cm long, 

 1 to 3 mm wide; panicle erect, open, often diffuse, 15 to 35 cm long, 



FIGURE 321. Eragrostis palmeri. Pan- 

 icle, X 1; floret, X 10. (SilveusSSl, Tex.) 



FIGURE 322. Eragrostis intermedia. Panicle, X 1; floret, X 10. (Type.) 



at maturity mostly about three-fourths as wide, the axils pilose, some- 

 times sparsely so or rarely glabrous, the branches slender but rather 

 stiff, the lower in pairs or verticils, all spreading, often horizontal; 

 spikelets usually 3- to 8-flowered, 3 to 10 mm long, about 1.5 mm 

 wide, grayish or brownish green, the pedicels somewhat flexuous, 1 to 



