Cleome Serrulata. It is hardy to zone UK 4 and is frost tender. Traits of Cleome lutea and Cleome serrulata Both species are robust tap-rooted annuals native to the xeric valleys and plains of western North America.
In his diary Lewis observes that the Native Americans would grind the seeds of this plant into flour as well as boiling the rest of the plant for eating. The young tender shoots and leaves are good sources of vitamin A and calcium. The black dye made from this plant is used for the designs on SW pottery.
It is in flower from July to August.
Capparaceae caper kap-ar-AY-see-ee Brassicaceae mustard brass-ih-KAY. The black dye made from this plant is used for the designs on SW pottery. The young tender shoots and leaves are good sources of vitamin A and calcium. Cleome serrulata Rocky Mountain Beeplant was collected and catalogued along the Vermillion River in South Dakota on August 25 1804 by Lewis and Clarks.