This national park is the only tropical forest Dipterocarpus the best and largest in Borneo. About 65 percent of the region, is still a primary forest undisturbed by human activity and has many wild plant and animal communities.
As with other areas of West Kalimantan, generally the area is covered by jelutung (Dyera costulata), ramin (Gonystylus bancanus), damar (Agathis borneensis), Pulai (Alstonia scholaris), Rengas (Gluta renghas), ironwood (Eusideroxylon zwageri), Bruguiera sp ., Lumnitzera sp., Rhizophora sp., Sonneratia sp., the strangler fig, and medicinal plants.
Plant that is unique in this national park is the black orchid (Coelogyne pandurata), which is easily seen in the river Matan especially in February-April. The appeal of the black orchid flower seen in the form marked with a green color with a combination of black spots on the middle of the flower, and blooms between 5-6 days old.
Noted there are 190 species of birds and 35 species of mammals that act as seeds pemencar plants in the forest. All families of birds and most likely of all bird species in Borneo, there are in the forest park.
