PEEFACE Vll 



GRAY, Manual of Botany, American Book Company, New 



York City. 

 CHAPMAN, Flora of the Southern States, Cambridge Botanical 



Supply Company, Cambridge, Mass. 

 COULTER, Flora of Western Texas, United States Department 



of Agriculture, Washington, D. C. 

 GREENE, Manual of Botany of the Region of San Francisco 



Bay, Cubery & Co., San Francisco. 

 HOWELL, Flora of Northwest America. 

 COULTER, Manual of Eocky Mountain Botany, American Book 



Company, New York City. 

 GRAY, Field, Forest, and Garden Botany, American Book 



Company, New York City. 



It will also be found profitable to read the dis- 

 cussions of the various subjects in the following 

 works, which may also suggest further lines of 

 experimentation : 



KERNER and OLIVER, Natural History of Plants, Holt & Co., 



New York City. 



COULTER, Plant Relations, D. Appleton & Co., New York City. 

 BARNES, Plant Life, Holt & Co., New York City. 

 BAILEY, Lessons with Plants, Macmillan Company, New York 



City. 



ATKINSON, Elementary Botany, Holt & Co., New York City. 

 MACDOUGAL, Experimental Plant Physiology, Holt & Co., 



New York City. 

 ARTHUR and MACDOUGAL, Living Plants and their Properties, 



Morris & Wilson, Minneapolis. 



