OSMUNDA (Flowering Ferns)
Tall swamp ferns, growing in large crowns, with the fertile fronds or portions conspicuously unlike the sterile; sporangia opening by a longitudinal cleft into two valves.
Tall swamp ferns, growing in large crowns, with the fertile fronds or portions conspicuously unlike the sterile; sporangia opening by a longitudinal cleft into two valves.