This is another genus that is under discussion by taxonomists who estimate that there are between 80 and 255 species. Most include them in the Bignoniaceae Family while some include this genus in the Malvaceae Family while others say it belongs in Sterculiaceae. The debate continues. Members of this genus are native to areas in Africa and Madagascar. It is named for the French botanist and plant explorer, Joseph Dombey (1742-1794).