854 



GRASSES OF IOWA. 



1. ASPRELLA HYSTRIX. 



Asprella Hystrix Willd. Enum. 132. 1809. Watson and Coulter. Gray. 

 Man. Bot. 674. pi. 11. 1890. (6ed.) Scribner. Grasses of Tenn. Bull. Univ. 

 Tenn. Agrl. Exp. Sta. 7: 127. f. 185. 1894. 



Asprella hystrix (L.) Moench. Beal. Grasses of N. A. 2: 656. /. 125. 

 1896. 



Asprella hystrix (L.) Humb. Scribner. Bull. U. S. Dept. Agrl. Div. 

 Agros. 7: 308. f. 302 . 1900. (3 ed.) 



Hystrix Hystrix (L.) Millsp. Nash in Britton and Brown. 111. Fl. 1: 

 233. f. 541. 1896. 



Fxo. 252. Asprella Hystrix— a, spikelet; b, 

 spikelet without empty glumes at the base. (Div. 

 Agros. U. S. Dept Agrl.) 



/Aspre I la K jitri*. 



Fig. 252-a. Map showing distribution of 

 Asprella. 



• Specimens in herbarium. 

 +Localities observed. 



DESCRIPTION. 



Bottle Brush Grass. Culms three to four feet high, smooth. 

 Sheaths smooth or minutely scabrous above, ligule very short, its edge 

 shortly and finely fringed, leaf-blade 5 to 10 inches (10-20 cm.) long, 3 



