Athyrium erythropodum (Woodsiaceae, Pteridophyta), a new Philippine record

Athyrium erythropodum Hayata, which was previously thought to be endemic to Taiwan, has recently been discovered in the Philippines. This species has seldom been reported or described in the literature and if so has involved erroneous morphological description and diagnosis, which has caused confusion and partly erroneous taxonomic treatment. A detailed and revised diagnostic description of the species is provided in this report, along with illustrations showing its essential features.