Pronephrium heterophyllum ContentDistribution Citation Distribution Asia-Tropical: Philippines (Philippines present), Mindanao present, Samar present, southern Luzon presentMalesia: Philippines (Samar, Southern Luzon, Mindanao). Citation Christ 1897: Farnkr. der Erde: 244 Fee 1852: Gen. Fil: 309: t. 18C, f. 2 Copel. 1960: Fern Fl. Philip.: 378 Copel. 1905: Polypod. Philip.: 39 Holttum 1973 – In: Kalikasan: 62