I wanted to post a photo of Osmunda regalis a while ago, don't seem to have done that. Here is one with fertile fronds outside a condo at Gilford and Pendrell, two blocks from me. Edited - this doesn't come up on a search for ferns, so I am adding the common name Royal Fern.
The above-ground roots of Osmunda regalis were widely used in the past as a substrate to grow epiphytic orchids. This is a plant in the wild (they are very common in boggy spots and streams in our area), but I also see ‘trunks’ forming on the ones I grow in the yard and I like that look very much.