Hymenophyllum pluviatile is described as a new and uncommon fern endemic to New Zealand. Phylogenetic analyses of chloroplast DNA sequences show that H. pluviatile is distinct from the other New Zealand species in Hymenophyllum subgenus Globosa . Hymenophyllum pluviatile can be distinguished from its closest New Zealand relatives, Hymenophyllum australe and Hymenophyllum flexuosum , by a suite of morphological and ecological c...