Asia-Tropical: Philippines (Philippines present), Luzon present
Malesia: Philippines (Luzon).
This species is closely allied to P. angustifrons (Miq.) Ching from the Ryukyu Islands and Taiwan, but the Philippine plants ap- pear always to be much smaller than those from Taiwan. P. crystopteroides (Eaton) Ching in Japan and the northern Ryukyu Islands is also closely related.