Phu Hin Rong Kla National Park

The lower Mekong Dry Forest Ecoregion is characterized by a mosaic of habitats. The main forest type is deciduous forest. On higher quality soils or at higher elevation, areas of mixed deciduous forest and semi-evergreen forest occur. This mosaic of forest type is one of the reasons why such a large quantity and diversity of species are home to this landscape - the diverse forest patches act as key resource areas and refugia for a lot of wildlife.

Deciduous dipterocarp forests typically have an open canopy combined with a grassy understorey. Member of the forest's namesake family Dipterocarpaceae dominate the vegetation. While all other Dipterocarp-trees are evergreen, the six species in the dry forest are the only ones that lose their leaves during the dryer months of November to April. This is likely to be an adaptation to the region's climate with its strong, extended wet and dry seasons - shedding the leaves decreases the tree's surface area and reduces the amount of water that the trees lose due to transpiration.

Semi-evergreen forests have a taller and multilayered forest structure than deciduous dipterocarp forests. While such forest to lowland evergreen rain forest, they grow in areas with lower and more seasonal rainfall and are characterized by lower species diversity. Bamboos are common in the semi-evergreen forests of Cambodia's Eastern Plains Landscape, especially along seasonal waterways and after disturbance. Within the Dry Forest Ecoregion, semi-evergreen forest patches are essential in providing shelter to large mammals and key resources to many species.

Interspersed within these forests are seasonally inundated wetlands; natural clearings that provide sources of food and water for a wide variety if wildlife, especially during the latter stages of the dry season. These wetland, along with scattered permanent pools along seasonal river beds, form a crucial resource network throughout the Dry Forest Ecoregion, especially in the Eastern Plains and help to maintain many of its ecological processes.

This type of forest is less dense than the tropical evergreen forest because it has less large trees. This type of forest too is green all year round. The climate is quite cool because it is found at high altitudes. the hill evergreen forest is very important to the preservation of water sources.

Trees are mainly shrubs mixed with some pines. Smaller plants in the forest include ground orchids (Habenaria rdocheila, Phalaenopsis pulcherrima and Thunia alba) and other tropical plants such as wild roses, violets and lilacs (Caulokaempferia alba, C.saxicola and Impatiens musicola.[7] In addition there are small plants that grow on the larger trees such as moss and orchids.

There is only pine in the forest which is pine two leaves and three leaves. Normally pine forest grow lower than rainforest or same level as rainforest. In dry area can grow as well, but more than 200–1,800 metres (660–5,910 ft) from sea level. In Thailand pine forest mostly growth in Northern and East Northern part.