Asplenium antiquum

About

Asplenium antiquum is a species of fern in the family Aspleniaceae. It is sometimes referred to as Japanese Bird's Nest Fern or simply Bird's Nest Fern. In Japanese, it is known by ō-tani-watari and tani-watari. It grows on cliffs, logs and rocks, near waterfalls, in damp forests, and on tree trunks in southeastern China, Japan, Korea, and Taiwan. It is classified as an endangered species in both South Korea and Japan.

Summary from Wikipedia