Larkspur

a flower, akin to the columbine, belonging to the buttercup family. The larkspur differs from the columbine in having only one petal provided with a spur. The name comes from the shape of the spur, which resembles the rear toe of a lark. There are over sixty species in the north temperate zone. By the change of stamens into petals double varieties have been produced. Certain species of Rocky mountain larkspur are poisonous to stock, and cause serious losses on the ranges. See Loco Weed; Aconite; Buttercup; Columbine