Revision of the fern genus Polypodiopteris (Polypodiaceae)

The present revision deals with the systematics of the genus Polypodiopteris which is endemic to Borneo and is a precursor for the Flora Malesiana treatment of the family Polypodiaceae which will appear in the near future. It includes the recognition, the description and a full synonymy of three species with pectinate fronds, irregularly anastomosing veins, and lacking any soral paraphyses. Certain characters suggest a relationship with the genus Selliguea, but no conclusions can be made before the revision of that genus is finished.