BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 
160 
Podopogon Raf., Neogenyt. 4. 1825. Two names are given, “ Stipa avenacea ” 
L, and ‘“ barbata” Michx., both belonging to the same species. 
glumes and floret, X 2. 
Fic. 93.—Porcupine grass, Stipa spartea. Plant, X 3; 
