Grammitis diminuta is a fern in the family Polypodiaceae. The Latin specific epithet diminuta means "decreased" or "diminished", with reference to the tapered frond base. Description The plant is an epiphytic fern. It has a stout, erect rhizome with light brown, lanceolate scales. Its simple fronds combine a short stipe with a narrowly elliptic lamina 3–15 cm long and 0.4–0.8 cm wide. Distribution and habitat The fern is endemic to Australia’s subtropical Lord Howe Island in the Tasman Sea; it is confined to the cloud forest on the upper slopes and summits of Mounts Lidgbird and Gower. References diminuta Epiphytes Endemic flora of Lord Howe Island Plants described in 1952 Ferns of Australia Taxa named by John Gilbert Baker Taxa named by Edwin Copeland