Delphinium bakeri

Delphinium bakeri, or Baker's larkspur, is a species of perennial herb in the buttercup family, Ranunculaceae. It is endemic to California in the United States, where it is a federally listed endangered species. It is known in the wild from one remaining occurrence near Salmon Creek in Sonoma County, where only seven plants remained as of March 2006. D. bakeri grows from a thickened, tuber-like, fleshy cluster of roots, to a height of 70 centimetres (28 in). The leaves occur primarily along the upper third of the stem and are green at the time the plant flowers. The flowers are irregularly shaped. It has five conspicuous sepals, bright dark blue or purplish, with the rear sepal elongated into a spur. The inconspicuous petals occur in two pairs. The lower pair is oblong and blue-purple, the upper pair oblique and white. Seeds are produced in several dry, many-seeded fruits that split open at maturity on only one side. The species flowers from April through May. Baker's larkspur grows on......read more on Wikipedia.