A(a{OSTIDE.B. 20^ 



Culms more slender; panicle slender, thin; first glume 7 mm. 

 l()ii<,', second 10 mm. long: floral glume 8 mm. long. 



Bedford Co., Virginia. 



38. A. gracilis Ell. liot. S. C. & Ca. 1: U2 (1817). 



Culms erect, filiform, naked above, brandling below, 15-50 em. 

 long. The lower blades borne by the branches, leaving the main 

 internodes naked; ligule very short; blades of the culm about 5 

 in ninnber, erect, filiform, -1-0 cm. long. l*anicle exserted, very 

 slender, interrupted, spikelike, the appreased branches mostly in 

 (iouples. Spikelets about mm. long, the one-nerved empty 

 glumes and the floret nearly equal ; the lateral awns one-third to 

 one-half as long as the middle one, which is uncoiled, usually 

 10-] 5 mm. long. 



New Jersey, Scrihner for U. S. Dcpt. Agricul. 240; Delaware, 

 Clark 2950; Pennsylvania. Scribner 3424; Khode Island, Clark 

 4301 from Congden; New York, Clark; Iowa, llitthcovk. 



Sandy soil, New England to Illinois and Texas. 



Var. depauperata A. Gray, Man. Ed. 0:040 (1800). 



More slender, the lateral awns erect, 1-3 mm. long, the middle 

 one 0.5 cm. long. 



Mississippi, Tracy; New Jersey, Beal. 



Found with the former, into which it jiasses. 



Florida, Chapman. 



29. A. divergens Vasey, Contrib. U. S. Nat. Herb. 3: 48 (1892). 

 A. Sehiediana minor \'asey. Bull. Torr. t!lub, 13:28 (1880). 



An erect perennial, 30-45 cm. high. Sheaths mostly longer 

 than the internodes; ligule shortly ciliate; blades involute, 15-20 

 cm. long. Panicle included at tlie base, pyramidal, 15-17 cm. long, 

 rays in pairs or solitary, 3-8 cm. long, flower-bearing fi-om near 

 the middle. Spikelets diverging, empty glumes subequal, 0-8 mm. 

 long; floral glume 10 mm. long, becoming twisted with age; lateral 

 awns obsolete or nearly so, middle arm 10-17 mm. long. 



Very nearly allied to A. Schiediana Trin. & Rupr., and possi- 

 bly hardly a good s]>ecies. 



Arizona, Jones 4234 in 1884, Pringle. 



Texas to Arizona. 



