Campanulaceae (Bellflower Family) Base Flower Color: PurpleReproductive Phenology: Jul, Aug, Sept, Oct, NovBloom Notes: The difference between canbyi and nuttallii is the throat. Canbyi is pubescent (hairy) and nuttallii is glabrous (smooth, not hairy). Otherwise, they look exactly the same. For more information about this plant, Click Here.