Grammitis nudicarpa is a fern in the family Polypodiaceae.

The plant is a very small epiphytic fern.

It has a short rhizome with dark brown, pointed scales.

Its simple fronds combine a short stipe with a narrowly oblanceolate lamina 2–8 cm long and 0.3–0.8 cm wide.

[1] The fern is endemic to Australia’s subtropical Lord Howe Island in the Tasman Sea; it is confined to the densely shaded summit areas of Mounts Lidgbird and Gower.