creeping oxeye, Sphagneticola trilobata

When I first saw these peering up at me from beneath some bushes, they looked like cute little things. The flower heads are about an inch or a little more. Little did I know. Native to the North American tropics, they now occur in tropics everywhere. They are seriously invasive. They spread vegetatively, forming large mats to the exclusion of everything else. But as long as we're looking at eyes, we need to do oxeyes. And the obvious oxeyes have already been posted. It's not obvious to me why any flower gets to be oxeye, but it seems to be an old and persistent name with people of English heritage. With us, this oxeye has crept into lowlands, mostly near coasts, in FL, HI, and LA. Monroe Co FL, 1/26/13.