308 OHIO BIOLOGICAL SURVEY 



3. Aristida gracilis Ell. Slender Triple-awn-grass. A glabrous 

 annual grass with slender, sparingly branched stems, y 2 -2 ft. high, 

 in small tufts or solitary, with rather close sheaths, and with a 

 spike-like, slender panicle or raceme. Lemma usually mottled, with 

 a horizontal middle awn and two much shorter, erect, lateral awns. 



In dry sandy soil. Aug., Sept. Hamilton, Clermont, Athens, 

 Erie, Cuyahoga. 



4. Aristida purpurascens Poir. Purplish Triple-awn-grass. A 

 glabrous perennial grass, growing in small tufts, with erect, simple 

 or sparingly branched stems, \-2y 2 ft. high, and with a strict or 

 sometimes nodding purplish panicle with appressed branches. Lemma 

 with a horizontal middle awn and two somewhat shorter erect or 

 divergent lateral awns. 



In dry sandy or gravelly soil. Sept., Oct. Wood, Fulton. 



