Approximately two-thirds of the park is forested, dominated by hardwood species. Eight forest formations are found in the park: forest over ultramafic soils, forest over limestone soils, montane forest, freshwater swamp forest, lowland evergreen tropical rainforest, riverine forest, beach forest, and mangrove forest. In the coastal area, sea grass beds and coral reefs are also found. At least 800 plant species of plants from 300 genera and 100 families have been identified in the Park. These include at least 295 trees dominated by the dipterocarp species. The diverse species of flora in and around the Park represents a very important gene pool of economically important plant species including rattans (Calamus sp), almaciga (Agathis philippinensis).