Harebell Family: Campanulaceae
This family consists mostly (but not always) of regular, bell-shaped flowers with five separate sepals, five united petals, and five stamens. Flowers are generally blue, purple, or white. The lobelias form a subfamily of Campanulaceae, Lobelioideae, and break the rules above, having irregular flowers often with pointy lobes. Family members include harebell, lobelia, and cardinal flower.