Erysimum capitatum(Dougl. ex Hook.) Greene

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Erysimum capitatum is a species of wallflower known commonly as the sanddune wallflower, western wallflower, or prairie rocket.

This species can be found in regions across North America, from the Great Lakes to the West Coast of the United States. Some varieties have an extremely narrow distribution, especially those endemic to California.

Description

Erysimum capitatum is a mustard-like plant with thin, erect stems growing from a basal rosette and topped with dense bunches of variably colored flowers. Flowers are most typically bright golden, yellow, or tangerine-colored, but plants in some populations may have red, white or purple flowers. Each flower has four flat petals. Seed pods are nearly parallel to the stem. It is a biennial herb and its native habitats include plains, foothills, and high elevation coniferous forests. The Latin specific epithet capitatum refers to the head-like shape of the flower cluster or the knobby stigma.

Erysimum capitatum - Wikipedia

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