AGROSTIDE^. 20^ 



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

 long, second 10 mm. long; floral glume 8 mm. long. 

 Bedford Co.. Virginia. 



28. A. gracilis Ell. Bot. S. C. & Ga. 1: 142 (1817). 



Culms erect, filiform, naked above, branching below, 15-50 cm. 

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

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

 in number, erect, filiform, 4-G cm. long. Panicle exserted, very 

 slender, interrupted, spikelike, the apj)ressed branches mostly in 

 couples. Spikelets about 6 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 

 10-15 mm. long. 



New Jersey, Scribner for U. S. Dept. Agricul. 240; Delaware, 

 Clar'k 295G; Pennsylvania, Scrihier 3424; Rhode Island, Clai'k 

 4361 from Congden; New York, Clark ; Iowa, Hitchcock. 



Sandy soil, New England to Illinois and Texas. 



Var. depauperata A. Gray, Man. Ed. 6:640 (1869). 



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

 one 0.5 cm. long. 



Mississippi, Tracy; New Jersey, Beal. 



Found with the former, into which it passes. 



Florida, Chapman. 



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

 A. Schiediana 7ninor \asey, Bull. Torr. Club, 13:28 (1886). 



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 the base, pyramidal, 15-17 cm. long, 

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

 the middle. Sjiikelets diverging, empty glumes subequal, 6-8 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. Schiediaiia Trin. & Rupr., and possi- 

 bly hardly a good species. 



Arizona, Jones 4234 in 1884, Pringle. 



Texas to Arizona. 



