LETTER Ol' TRANSMITTAL. 



Washington, September, 1891. 

 Sir: I have the honor of i)i'eseuting for publication the fii'st volume of the pro- 

 posed work called "Illustrations of North American Grasses," which have been 

 issued as Bulletin No. 12, parts I and II: and it is pro]iosed to follow this with a 

 second volunu- of plates and descriptions of the " Grasses of the Pacific Coast." 

 Respectfully, 



Geo. Vasey, 



Botanist. 

 Hon. J. :\[. Rusk, 



Secr<4nry of AijriruHure. 



