I'm reading on digest, so someone may have already identified this, but I think it looks like Calibrachoa parviflora [Petunia parviflora] (Solanaceae). That species is in the SE US for Florida, Alabama, Louisiana, and Texas. See images from Texas at: http://www.csdl.tamu.edu/FLORA/cgi/gallery_query?qÊlibrachoa Monique Reed Biology Department Texas A&M