All of the research I've done of the Calusa's, and I paid for some of it while researching a bracelet I found from the De Soto era, said that the bows they were shooting were over six feet tall and the Spanish soldiers had a very hard time pulling them back. De Sota died in Mississippi from a cane arrow infection by one of the tribes north of Florida.
There is not of lot of the real, native wood left in South Florida, including the majestic, Bald Cypress. I was very surprised how fast, easy to make, and hard hitting a cypress bow was that we made at my house in one day with minimal tools.