Delphinium scaposum, the tall mountain larkspur or barestem larkspur, is a species of flowering plant in the family Ranunculaceae.[1] It is native to the desert southwest of the United States, and to Sonora in northwestern Mexico.[2] A perennial reaching, it prefers dry, gravelly soils, and is "avidly" pollinated by bumblebees and hummingbirds.[1]