Dillenia philippinensis (katmon) is a species of flowering plant in the family Dillenaceae.

Katmon grows in low to medium altitude forests throughout the Philippines, but does not survive the cold climates of the uplands.

The leaves are leathery, shining, ovate, elliptic or oblong-ovate, about 12 to 25 centimeters long, and coarsely toothed at the margins.

Its flowers are white, large, showy, and about 15 centimeters in diameter with reddish pistils and stamens.

The fruit's acid is mixed with sugar to make a traditional cure for cough.