Hypnum impomens forming a matting structure along a log in a tributary before it dropped off a few hundred feet into the Indian Creek of Red River Gorge . matting black veined feather moss or black veined fern moss are two common names that refer to a diagnostic feature that is apparent among this commonplace moss. Despite how common this species is and the diagnostic feautres it can be easily mistaken for a moss that grows along pin cushion and broom mosses at the forest floor.  chalk comb moss, Ctenedium molluscum.