To correctly model stomatal conductance, we need to know if a tree or a plant in general is amphistomatous or not (having stomata on both sides of the leaf or not), but a list of amphistomatous species is hard to find.
The character is variable and often a small leaf replica on dental resin or porometry may be of help. Very high light fluence and leaf thickness in trees are posdsible indicators as unifacial leaves like in eucalypt, for a list you may use refs in http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3276089/ or ask prof Mott for some earlier work in PCE of 1982 dec. issue that I do not have in shelf http://www.biology.usu.edu/htm/our-people/faculty?memberID=3090
I think the stomata traits are mainly depending on light condition, or other environmental, i.e. urbanization(city–suburb–exurb ). In our study, amphistomatous traits in three tree species, Cinnamomum camphora (L.) Presl, Platanus Linn., and Populus euramevicana were affected by urbanization(city–suburb–exurb ).