Potter, J.L.Mabry, T.J.Phytochemistry2010-02-152010-02-151972http://hdl.handle.net/1969.3/18868p. 715-723.The volatile terpene and sesquiterpene lactone patterns for 20 populations af Ambrosia psilostachya from the Texas Mainland and Gulf Coast Islands and 7 populations of A. cumanensis from near Vera Cruz, Mexico, were determined and the resulting volatile terpene data were analyzed by numerical classification methods. The terpene data indicated that the Texas Gulf Coast islands populations of A. psilostachya are genetically closer to the Vera Cruz, Mexico populations of A. cumanensis that they are to the Texas mainland populations of A. psilostachya.botanyspecies differentiationecological distributionAmbrosia psilostachyaAmbrosia cumanensisArticle