I noticed these morning glory like flowers among the vegetation in the park. It may be the Jacquemontia which is an increasingly rare plant that used to be found crawling along sunny rocky ledges throughout the open pinelands of the three southernmost counties in Florida.
Its flowers (about 1" across) are found throughout the year, and it attracts bees and insects. It is in the morning glory family, but is not aggressive.
While swimming here, everyone got very excited because a manatee swam right past Michael! The water is so clear, and the beautiful colors that reflect. Didn't see any critters to be worried about!