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



whole panicle finally breaking away and tumbling before the wind; 

 spikelets distant, nearly sessile, appressed, linear, 5- to 12-flowered, 

 8 to 12 mm long; glumes acute, about 3 mm long; lemmas loosely 



imbricate, acuminate, becoming somewhat in- 

 durate, 3 to 3.5 mm long, the lateral nerves 

 prominent ; palea prominently bowed out below. 

 % (Acamptoclados sessilispica Nash.) — Plains 

 and sandy prairies, Kansas to Texas, New 

 Mexico, and northern Mexico (fig. 271). 



3. Eragrostis curtipedicellata Buckl. (Fig. 

 272.) Perennial; culms tufted, erect, 20 to 

 40 cm tall; sheaths pilose at the throat; 

 blades flat or loosely involute, 1 to 3 mm wide ; panicle open, spreading, 

 at first 15 to 20 cm long, the axis and branches viscid, rather sparingly 

 pilose in the axils, finally elongating, breaking away and tumbling 



Figure 271.— Distribution of 

 Eragrostis sessilispica. 



Figure 272.— Eragrostis curtipedicellata. Panicle, X 1; floret, X 10. (Ball 898, Tex.) 



before the wind, the branches stiffly ascending or spreading; spikelets 

 oblong or linear, short-pediceled, somewhat appressed on the primary 



and secondary branches, 6- to 12-flowered, 3 



to 6 mm long; glumes about 1.5 mm long; 



lemmas rather closely imbricate, oblong, 



acute, about 1.5 mm long; palea ciliate on 



the keels, not bowed out; grain 0.7 mm 



long. % — Plains, open woods, and dry 



slopes, southern Kansas to Texas and New 



Mexico (fig. 273). 



4. Eragrostis secundiflora Presl. (Fig. 274.) Perennial; culms 



tufted, suberect, 20 to 40 cm tall; sheaths pilose at the throat; blades 



flat, more or less involute in drying, 1 to 4 mm wide, tapering to a 



FrGURE 273.— Distribution of 

 Eragrostis curtipedicellata. 



