107 



Fig. 89. Stipa spartea Trin. Porcupine-grass. — A stout, erec t 

 perennial, with simple culms 6 to 10 dm. high, long, narrow leaver 

 and few-flowered panicles. The strong, twisted awns are 8 to 15 

 cm. long, and at the hase of the flowering glume is a long, pointed, 

 and bearded callus. — Prairies, Illinois to Colorado, north to Mani- 

 toba and British Columbia. June-August. 



