GRASSES OF IOWA. 



351 



Fig. 250. Ely mu* Canadensis— a,, spikelet; 

 b, flowering glume; c, palet. (Charlotte M. 

 King.) 



Fig. 251. Elymus robustus—n, empty glumes; b, 

 spikelet with empty glumes removed. (Div. Agros. U. 

 S. Dept. Agrl. ) 



DESCRIPTION. 



Canada Lyme Grass. A rather stout, smooth grass, 3 to 5 feet 

 (7-12 cm.) high, with flat, green or glaucous, scabrous leaves, 6 to 12 

 inches (1^-3 dm.) long. Sheaths smooth. Spikes 4 to 9 inches (1-2 

 dm.) long, exserted, nodding; rachis hirsute. Spikelets mostly in pairs, 

 three to five-flowered, with rigid glumes; empty glumes subulate, three 

 to four-nerved at base, awn pointed ; flowering glumes rough hairy or 

 nearly smooth, usually long-awned. Loess bluffs. July-August. 



