Moving stuff around in the back yard this evening and I see lemony yellow blossoms peeking from under 8" begonia leaves in a clump of plants that had been placed together under the huge live oak tree (LIve oaks have leaves on all year long) and then covered during freezing weather. While the covers had been taken off, the plants hadn't been re-located. (And I had been thinking I was missing a pot of daylilies...)
Sorry about the color quality, this is really a sunny little guy, and I'm totally amazed it could bloom under such conditions.