vol.vi. BOTANr. U. S. GEO&RAPHICAL SURVEYS WEST OF 100 TH MERIDIAN. piate xxvn. 



W.H. Seaman, Del. 



Fitfs 1-3 TRISETUM WOLFII. Figs. 4-6 TRISETUM ALPESTRE. Figs. 7-9 VILFA MINIMA 



