160 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 



Podopogon Raf., Neogenyt. 4. 1825. Two names are given, " Stipa avenacea 

 L. and " barbatu " Michx., both belonging to the same species. 



Fie. 93. Porcupine grass, Stipa spartea. Plant, X 1 ; glumes and floret, X 2. 



