GRASSES OF IOWA. 



I 



269 



Fig. 187. Scolorhloa festucacea—a. b, spike- 

 lets. (Div. Agros. U. S. Dept. Agrl.) 



Fig. 188. Glyceria nervata—a, "b, spikelets ; 

 c, d, flowering glumes. (Div. Agros. U. 8. 

 Dept. A*;rl. 



15. GLYCERIA. 



Glyceria R. ir. Prod. 179. 1810. Endlicher. Gen. PI. 98. Bentham 

 and Hooker. Gen. PI. 3: 1197. Hackel in Engler and Prantl. Nat. Pflanz. 

 Fam. II. 2: 74. /. 86. 



Panicularia Fabr. Enum. PI. Hort. Helmst. 373. 1763. Scribner. 

 Bull. U. S. Dept. Agrl. Div. Agros. 20: 153. /. 122. [Rev. ed.] 



Hydrochlou Hartm. Gram. Scand. 8: 1819. 



Porroteranthe Steud. Syn. Glum. 1: 287. 1855. 



Spikelets terete or flatfish, several to many-flowered ; the flowers 

 mostlj early deciduous by the breaking up of the rachis into joints, leaving 

 the short ami unequal, one to three-nerved, membranaceous, lower glumes 

 behind. Flowering glume and palet naked, of a rather firm texture, 

 nearly ecpial ; the glume rounded on the back, scarious (and sometimes 



