Niphobolus davidii Cyclophorus pekinensis Polypodium davidii Cyclophorus transmorrisonensis Cyclophorus subfissus Cyclophorus davidii Niphobolus gralla Cyclophorus gralla Pyrrosia gralla Pyrrosia subfissa Pyrrosia transmorrisonensis Pyrrosia nudicaulis Pyrrosia pekinensis
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024