Ferns in the genus Selliguea generally have a thick, leathery lamina, but this epiphytic species has one of the thickest… The sori are deeply sunken, and visible on the adaxial surface.
Selliguea stenophylla

Ferns in the genus Selliguea generally have a thick, leathery lamina, but this epiphytic species has one of the thickest… The sori are deeply sunken, and visible on the adaxial surface.