320 



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

 Agr., Div. Agros. Bull. 11 : 57, pi. 17. 1898. Salt Lyme-grass.— 

 A wiry, erect perennial, 3 to 4 dm. high, from strong, creeping 

 rootstocks, with flat (finally involute) pungently-pointed, 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 flow- 

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

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



