The family Campanulaceae (also bellflower family), of the order Asterales, contains about 70 genera and 2000 species. They are mostly herbs, shrubs, and more rarely small trees, which usually have milky non-toxic sap. The family includes the familiar garden plants Campanula (or bellflower), Lobelia, and the balloonflower (Platycodon.)
This family is almost cosmopolitan but concentrated in the Northern Hemisphere. However in the Southern Hemisphere, South Africa is remarkably rich in members of this family. These species are absent in the Sahara, Antarctica and northern Greenland.
Most current classifications include the segregate family Lobeliaceae in Campanulaceae.