 It is covered by montane forest, lowland tropical forest, coastal forest and mangrove forest.Plants in the park include Nipa palm, "Casuarina equisetifolia", "Anisoptera curtisii" and "Gonystylus bancanus", as well as Sonneratia, Pandanus, Shorea and Dipterocarpus species.Large flowers in the park include the "Rafflesia arnoldii", "Amorphophallus decus-silvae", "Amorphophallus titanum" and the world's largest orchid the "Grammatophyllum speciosum".