Polypodium amphostenon Campyloneurum cooperi Campyloneurum amphostenon var. amphostenon Campyloneurum pittieri Polypodium pittieri Polypodium crassifolium f. angustissimum Campyloneurum leucorhizon Polypodium leuconeuron var. latifolium Polypodium angustifolium var. amphostenon Polypodium angustifolium var. monstrosum
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024