There are 524 species of plants in Mount Musuan under 353 genera and 135 families. 301 species are trees, 51 shrubs, 50 grasses and sedges, 46 herbs, 42 vines, 31 ferns, and 3 fern allies. 188 species (35%) are economically important, 128 species (24%) are endemic, and 3 (1%) are endangered species. Musuan peak has approximately 6,354 individual trees. The most common tree species (in density and frequency) are the Melanolepis multiglandulosa (Kamala tree) and Colona serratifolia, followed by Clausena brevistyla and Alstonia scholaris (Blackboard tree). Three species of pteridophytes are locally threatened: Marsilea crenata (apat-apat), Ceratopteris thalictroides (pakung-sungay), and Lycopodiella cernua (clubmoss). 10 species of pteridophytes are endemic to the area.