Very similar in appearance to several non-natives which are invasive pests, esp. N. cordifolia. If there are spherical tubers amongst the roots, it's N. cordifolia, the invasive tuberous swordfern.  In this vein, it appears that herbarium specimens from further north than indicated on our map have been reclassified as something other than N. exaltata.  We do not show those areas on our map. Groundcover especially in shady moist areas. Spreads by rhizomes.

Would be nice to see this used more in restoration, but the hydrology and substrate need to be correct. Adapted to edge of marshes. Suited for use only where the hydrology matches its needs. Where present, protect by protection hydrology and water quality.