I had a Sylvester Palm that had some unusual growth, so I stopped at KB Nursery on 462 in Wildwood. They gave the website for the University of Florida Sumter Agricultural Community Extension, attn: Jim Davis.
I emailed him a couple of photos of the tree, and within two days he sent me back a full response.
UF/IFAS Extension Contact Jim Davis
Here's is one of about 3 photos I sent him last August, I was going to have the 7 year old tree removed.
Here's the tree 8 months later, had about 10' of old growth removed from the top, irrigation was adjusted, palm fertilized and rocks replaced and some new shrubs added, all done by Terrascape of Wildwood.