First record of Hypodematium squamuloso-pilosum Ching (Hypodematiaceae) from Korea

A new unrecorded species, Hypodematium squamuloso-pilosum Ching (Hypodematiaceae), previously known only in China, was newly found on the rocks of a limestone mountain in Yeongwol-gun, Gangwondo, Korea. This taxon is distinguished from H. glanduloso-pilosum (Tagawa) Ohwi, reported as a species of Hypodematium in Korea based on linear lanceolate scales on the rhizome and a stipe base, white long hairs throughout the leaves, rarely reddish brown curly linear scales on the stipe, and oblong-lanceolate basal pinna. This taxon was most similar to H. hirsutum based on the plant height, rhizome, scale shape and size, sori position, and indusium shape. A new Korean name, ‘Huin-geum-teol-go-sa-ri’, was given based on the long white hair throughout. Descriptions and illustrations of this taxon and a photograph of its habitat are provided from Korea.