Wow Phil, that is pretty old, they're all very nice. I see lots of stag ferns on the ground growing around here, I'm sure most have fallen from trees, they seem to do well on the ground as well. I didn't notice you are in Lakeland, not too far from me. 434 is four lanes on Winter Springs side now, but does go down to two lanes past 417 on the Oviedo side and some tight curves.
A break from the rain, so I took pics of my two largest staghorn ferns.
This one was given to me by a friend that moved to Hawaii a few years ago, I'm not sure how old it is, but was looking pretty neglected when she gave it to me, has rebounded very well.
This one I bought over ten years old, it's in an orchid basket somewhere in side that plant, had to put a chain around it eventually. I'm not sure if they're both the same kind.