LETTER OF TRANSMITTAL. 
Smr: T have the pleasure of transmitting herewith for publication 
the first part of a Manual of the Plants of Western Texas, which has 
been prepared by Prof. John M. Coulter by the instruction of this De- 
partment, and mainly as the result of investigations which have been 
prosecuted in Texas under direction of the Botanical Division, by Mr. 
4. C. Nealley, of Houston, Tex. 
Dr. GEORGE VAskEy, 
Botanist. 
Hon. J. M. Rusk, 
Secretary of Agriculture. 
MARCH 2, 1891, 
