Richard, on the thread on i.d. of the florida euc there was also some discussion on eucs in texas. a recent posting (3/22) suggested googling an article on "the eucalyptus in texas"----among the other results that came up in THAT search came this site: www.kmaenvironmental.com with reference to the hybrid red gums though i could find no further details on just what the hybrid involved---was it indeed a "true" hybrid between 2 distinct species or simply a selection of a particular eco-type (as you seem to be referring to in your post) i can't find out???