the lobelia family of the bellflower order (Campanulales), containing about 25 genera and more than 750 species of flowering plants, native to both ... Found on http://www.britannica.com/eb/a-z/l/64
Lobeliaceae is a tribe of Campanulaceae, differing from Campanulaceae proper in having irregular flowers, and like the Compositae syngenesious anthers, but otherwise resembling them very nearly. Found on http://www.probertencyclopaedia.com/browse/BL.HTM