They call it the "Royal Fern"

To make room for some changes in the garden, I dug up my Osmunda regalis today, and put it in a pot. The common name for this beauty is "Royal Fern," and never was there a plant name so apt...

I hadn't realized how big it had grown until I had to lift it out of the ground. It's about 7' wide. It dies back every winter, and ts return is one of the treats of Spring.