Hymenophyllum cf. brassii

This is a distinctive plant characterized by dramatically tooth-like laminar flanges the tips of which are modified into blackish setae. The setae are present adaxially and are either simple or bifurcate. They are also present on the adaxial rachis. This specimen is sterile and fragmented. It was collected along with bryophytes during an altitudinal transect. It appears very similar to H. brassii, but that plant usually has longer leaves, and less congested pinnae. It’s not entirely clear if this is simply a juvenile or aberrant specimen, or some other species, so we consider “cf. brassii” for the time being.