Ebony Spleenwort
Ebony spleenword, Asplenium platyneuron, is found in many places in the Eastern United States
iNaturalist map of A. platyneuron
A. platyneuron is a pinnate fern. It stand upright. The sterile and fertile fronds are the same.
Shelton Open Space, Shelton, CT, USA
Out of focus closeup of fertile pinna
Most of the underside of the fertile pinna are covered in sori.