Delphinium scaposum

Delphinium scaposum, the tall mountain larkspur or barestem larkspur, is a species of flowering plant in the family Ranunculaceae. It is native to the desert southwest of the United States, and to Sonora in northwestern Mexico. A perennial reaching 60 cm, it prefers dry, gravelly soils, and is "avidly" pollinated by bumblebees and hummingbirds.