The 



Plant World 



j\ Magazine of General Botany 



VOLUME. 12 

 NUMBER 7 

 JULY 190 9 



Containing 



A Chemical Device to Illustrate Mendelian Inheritance 



By George Harrison Shull 145 



The Plant Societies of Monterey Peninsula 



By H. B. Humphrey 152 



Parry and Southern California Botany 



By S. B. Parish 158 



Observations on Cacti in Cultivation 



By J. C. Blumer 162 



Books and Current Literature 164 



Tucson, Arizona 



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

 Arizena. under the Act of Congress of March 3, 187Q 



