Buttonwood, Conocarpus erectus, is found often in association with mangroves that many consider it a mangrove itself. There is some merit to the argument. The United States Department of Agriculture calls it buttonwood mangrove. Others say there are only three mangroves that grow in Florida, and buttonwood isn’t one of them.
Buttonwood produces seeds rather than propagules. Buttonwood live farther from water than red, black, and white mangrove. They are usually found above the high tide line. The flowers and fruits do not remain long, but are distinctive when seen.