Myanmar with an area of 667,553 square kilometers is endowed with vast areas of natural forests ranging form beach and dune forests, mangrove forests in costal and delta areas in the south to varied terrestrial vegetation of dry and moist deciduous forest and evergreen forest in the central and coniferous dominated sub-temperate forest types on the high mountain parts of far north. Occurrence of diverse forest types are largely due to influence of rainfall, temperature, type of soil, topography and closeness to the sea. Moreover, in Myanmar unique ecosystems are recognized according to the interaction between physical components in environment of a locality and plant communities thrive therein.