11 



Fig. 307. Manisuris cylindrica (Michx.) Kuntze, Rev. Geu., 

 PL 779. 1891. {Trixjsacum cylindricum M-ichx.; Rotthoellia cylindrica 

 Ton-., Chapm.). Slender Rat-tail-grass. — A slender perennial 

 with nearly terete, erect culms 60 to 90 cm. high, narrow leaves 

 15 to 30 cm. long, and cylindrical spike-like racemes 12 to 18 cm. 

 long. Sessile spikelet (&) 6 to 7 mm., long with the iirst glume 

 (c) firm in texture and slightly pitted on the hack. — Prairies, 

 Florida to Arkansas, Oklahoma, Indian Territory, and Texas. 

 June-Septemher. 



