the indochina bioregion is defined by mackinnon and mackinon (1986) to include myanmar and thailand rather then being restricted to french indochina (i.e.,laos,cambodia,and vietnam) , and we follow this definition. it extends from the indo-burmese border to the kangar-pattani line that demarcates the northern limits of the malesian flora (van steenis 1950;whitmore 1984)