380 



647. 



GRASSES OF IOWA. 

 1. HORDEUM DISTICHON. 

 Hordeum disiichon L. Sp. PI. 185. 1753. Beal. Grasses of N. A. 2: 



Fig. 233. Left, Hordeum disiichon; right, Hordeum vulgare var. 

 tri/uroatum: a, trifurcate scale. (Charlotte M. King.) 



