UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



BOTANY 



Vol. 7, Nos. 6-7-8, pp. 159-278, pis. 18-20, 8 figs, in text. November 7, 1919 



A RUBBER PLANT SURVEY 



OF 



WESTERN NORTH AMERICA 



BY 



HARVEY MONROE HALL 



AND 



THOMAS HARPER GOODSPEED 



UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY 



