The second picture looks like live oak leaves (imagine that!), with willow oak leaves on the far right. A good tree to think about adding, especially if you have wet spots, is the
bald cypress. You don't need me to send you any bald cypress seeds, but if you want to know how to collect cypress cones this winter and start seedlings next spring, I can walk you through that exercise. Before it was settled, Florida was a huge cypress swamp, and now there is hardly any old growth cypress swamp left.
