320 



Fig. 616. Elymus simplex Scribn. ami Williams. U. S. Dept. 

 Agr.,Div. Agros. ]5ull. 11:57, pi. 17. 1898. Salt Lyime-grass.— 

 A wiry, erect ])(;rennial, 3 to 1 dm. high, from strong, creeping 

 rootstocks, with Hat (finally involute) pungeutly-pointeil, rigid 

 leaves and densely-flowered, erect spikes 5 to 8 cm. long. Spike - 

 lets solitary or in pairs, 5- to 7-flowered, about 15 mm. long, with 

 very rigid and subulate-pointed empty glumes and smooth liow- 

 ering glumes, which are about 7 mm. long, with rigid awns 5 to 6 

 mm. long.— Borders of ponds, Wyoming. July, August. 



