The 



Plant World 



A. Magazine of General Botany 





VOLUME 12 





NUMBER 1 





JAN. 1 9 O 9 





Containing 





Relation of Plant Growth to Climatic Conditions 



By J. J. Thornber 



1 



An Arizona Mesa 



By J. C. Blumer 





Inheritance in Tomato Hybrids 



By H. L. Price and A. \V. Drinkard. Jr. 



10 



Cultivated Plants in the Arid Southwest 



By V. M Spalding 



18 



Books and Current Literature 



21 



Tucson, Arizona 





Entered as Second Class Matter, Dec. 17, 1907, at the Post-Office. Tucson, 

 Arizona, under the Act of Congress of March 5, 1879. 



