crested floatingheart, Nymphoides cristata

Oops! When the random selection came up floatingheart, I began looking up lore. And became suspicious. How did I get a picture of our native species farther south than it is supposed to be? I didn't. Another misidentification. This turns out to be crested rather than little floating heart. Most unfortunately, it's an Eurasian invasive. It's starting to choke waterways where it appears in FL and SC. Big Cypress National Preserve, Collier Co FL, 1/25/13.