Abstract: Monsoon forest is a vegetation type distributed in tropical regions which has distinct dry and wet seasons. It is more or less leafless during dry season. It is one of the zonal vegetation types in East Asia distributed between tropical forest and savannah forest on the moisture gradient, instead of between tropical forest and subtropical evergreen broad-leaved forest on the temperature gradient. We believe that the monsoon forest could not develop under the climate of Guangdong areas, China. For instance, the Ficus microcarpa + Syzygium odoratum + Sterculia lanceolata formation was not monsoon forest, but tropical seasonal rain forest belonging to tropical rain forest in a wide sense.