Delphinium is a genus of about 300 species of perennial flowering plants in the family Ranunculaceae, native throughout the Northern Hemisphere and also on the high mountains of tropical Africa. Tall larkspurs have a spurred blue flower, similar to that of garden delphinium. Broad leaves are divided into deep lobes. In contrast, wild geranium, which is often mistaken for larkspur, has shallow leaf lobes. Tall larkspur is a perennial that is found on hillsides and in meadows. It ranges in height from 1 to 2 meters. A hollow stem distinguishes larkspur from poisonous monkshood, which has a similar blue flower but with a hood.