GRASSES OF IOWA. 



327 



awnless; flowering glumes oblong, ventricose or rounded on the back, 

 sometimes keeled above, five to nine-nerved, awned or awnless; palet 

 two-keeled, keels ciliate. Stamens 3. Style verj short; stigmas plumose. 

 Grain ovoid or oblong, silicate, hairy at the apex, free or adherent to the 

 palea. Annual, erect grasses with terminal, cylindrical spikes. 



There are twelve species of Aegilops native to southern Europe and 

 Asia; one species, the Aegilops ovata, occurs in southern Europe. There 

 are three species of the section Sitopyros. 



Fig. 231-a. Fig. 231-b. 



a— 1, English Wheat. Triticum sativum b—1, Common Bearded Winter Wheat. 



turyidum; 2, Flint Wht at. Triticum sativum Triticum sativum i-ulgare; 2, Triticum 

 durum. (HackeJ. ) sativum vulgare muticum. (Hackel. ) 



1. TRITICUM VULGARE. 



Triticum vulgare Vill. Hist. PI. Dauph. 2: 153. Beal. Grasses of N. 

 A. 2: 642. /. 122, 1896. 



Triticum sativum Scribner. Grasses of Term. Bull. Univ. Term. Agrl, 

 Exp. Sta. 7: 124. 1894. 



