Erigeron vetensis

Erigeron vetensis is a North American species of flowering plant in the daisy family known by the common name early blue-top fleabane. It is native to the western United States (primarily in the Rocky Mountains of Wyoming, Colorado, and New Mexico but with an isolated population in Nebraska).
"Erigeron vetensis " grows in dry, open sites in openings in conifer forests. It is a perennial herb up to 50 centimeters (20 inches) tall. It generally produces only one flower head per stem. Each head contains 30–90; blue, purple, or white ray florets surrounding numerous yellow disc florets.