U.S. ni<:rARrMKxi- ov A(;Ricin;ruRH 



BUREAU OF PLANT INDUSTRY BULLETIN NO. 33. 



h. T. <;.\l.l.(i\VAV, flii.f ..I Hmviin. 



NORTH mwm SPECIES (IE LEPTOCHLOi, 



BY 



A. S. IIITCIKOCK. 

 Assistant Aorostoi.ocist, i\ ('iiAR<iK ok CoopKitArn 



KxrKKIMKN TS, 



GRASS AND FOHAGE PLANT INVESTIGATIONS. 



IssiEi) Fkhuiwky lU, iW3. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1 9 <:» 3 . 



