Aconitum genus --- buttercup family
monkshood (Aconitum columbianum) -- in July -- Cub Lake Trail, Rocky Mountain National Park, CO blue & purple
monkshood (Aconitum columbianum) -- in July -- Rollins Pass Road, Gilpin County, CO
monkshood (Aconitum columbianum) -- in August -- Montgomery Pass Trail, Larimer County, CO