most of the conifers of Thailand have disjunct distributions. Dacrybium elated occurs in khan yai national park and in phu luang wildlife reserve at its northernmost limit. On the other hand, conifcr spccics from China , such as cephalotaxus griffithii and. Calocedrus macrolepis have a very patchy distribution south of the Mekong in evergreen montane forest. Lt is interesting to note that the conifer keleleerla which occurs in sandstone mountains of Laos close to stands of pints merkusii, does not exist in Thailand from the present distribution of the conifers in Thailand it can be concluded that they had a vaster range during the quaternary pints merkusii populations of Thailand and Sumatra may have been connected via stepping stones along the Malay peninsula and nowadays the gulf of Thailand for pints kesiya it still has to be proved whether the Thailand and Luzon populations were connected via borneo