Endemic to Hawaii...
Incredibly common in almost all areas of Hakalau NWR. Photo from Pedro Tract, near banding station.
Fern growing on steep bank
I only saw this place in the day.
Dicranopteris linearis is a common species of fern known by many common names, including Old World forked fern and uluhe (Hawaiian). It is one of the most widely distributed ferns of the wet Old World tropics and adjacent regions, including Polynesia and the Pacific. In parts of the New World tropics its niche is filled by its relative, Dicranopteris pectinatus.