UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



BOTANY 



Vol. 5, No. 1, pp. 1-86, pis. 1-28 Issued December 5, 1912 



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STUDIES IN NICOTIANA. I. 



BY 

 WILLIAM ALBERT SETCHELL 



In 1906, as a consequence of a certain interest in the history 

 of the origin and spread of the use of tobacco, I began to culti- 

 vate such species of Nicotiana, both native and horticultural, as 

 I could obtain seed of, in the Botanical Garden of the Univer- 

 sity of California. In all a total of 103 packets were sown that 

 year, and from 75 packets good plants were obtained. Of many 

 of these, seed was produced under bag and for the most part 

 this "pure seed" was from a single plant. Since 1906 the sow- 

 ings have been continued each year, from seed of the previous 

 year, as well as from seed from new sources, until finally a very 

 considerable assortment of species and varieties have been 

 grown. Gradually the number of plants have been reduced and 

 selected to a certain number to serve as a stock for breeding. 

 It is my intention in the present volume to publish the results 

 of the experience of myself and others, in connection with the 

 cultivation and experimentation with this stock of Nicotiana in 

 the Botanical Garden of the University of California. 



The expenses of these investigations have been borne partly 

 by the funds granted by the President and Regents of the 

 University of California for the up-keep of the Botanical Gar- 

 den and partially by certain allotments from that portion of 

 the Adams Fund of the United States Department of Agricul- 

 ture granted to the Agricultural Experiment Station of the 

 University of California. Through these means the work on the 

 Nicotiana species, detailed in this volume, has been carried on. 



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