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