That's a very nice Common Staghorn Fern (Platycerium bifurcatum) They do get quite large over time! We have a couple of large Staghorns but they aren't looking so great after our 2 cold snaps last month when temp's dropped into the 30's but I'm sure they will recuperate in the coming months.
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!