The Plant World 



A monthly magazine presenting illustrated articles on almost every phase 

 of plant life. Its list of authors includes some of the best teachers and writers 

 in botany. 



Descriptions of travels, experiments in the laboratory and garden, observa- 

 tions in the woods and fields, hybrids, plant breeding together with readable* 

 notes on books and current events are included among the topics treated. 



The September number contains the following articles: 



The Course of the Vegetative Seasons in Southern Arizona. By Dr. D. T. 

 MacDougal. Running through four numbers. 



Methods of Repr6dUcticn in Guayule (a Mexican Rubber Plant) and Ma- 

 ricla. By Professor F. E. Lloyd. 



LEAVES OF A HYBRID OAK. 



The Western Edge of the Colorado Desert. By Prof. V. M. Spalding. 



Bower's Origin of a Land Flora. By Dr. W. A. Cannon. 



The following are taken from the November number: 



Wa^er Culture Method for Experimenting with Potatoes. By J. J. Skinner, 



Gray's New Manual of Botany. By J. J. Thornber. 



Fall Blossoming of the Apple Induced by the Black Rot. By H. S. Reed. 



Books arid Current Literature. 



You may wish to see a sample copy: if so write for it. Cr ycu may already 

 know the Plant Wcrld (it is now in its tv/elfth year) ard are read}' to send $1.50 

 for a year's subscription. Do this at once and we will send ycu the numbers for 

 September, October, November and December. Mention the AMERICAN 

 BOTANIST when ycu write. 



The Plant World 



TUCSON, ARIZONA. 



