*courtesy of Herb Wagner    

Carl Linnaeus  (1707 - 1778) M.D. Harderwijk, Holland 1735

   Carl Peter Thunberg  (1743 - 1828)

      Olof Peter Swartz  (1760 - 1818)

         Elias Magnus Fries  (1794 - 1878)

            Thure Ludwig Theodor Kumlien  (1819 - 1888) (Greene's Wisconsin mentor )

               Edward Lee Greene  (1843 - 1915) Ph. B. [sic]: Albion College, Wisconsin | LL. D.: Univ. of Notre Dame

                   Willis Linn Jepson  (1867 - 1946) Ph. D.: University of California, Berkeley, 1899

                      Lincoln Constance  (1909-2001) Ph. D.: University of California, Berkeley, 1934