107 



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

 perennial, with simple culms G to 10 dm. high, long, narrow leaveb 

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

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

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



toba and British Columbia. 



June-August. 



