Closeup of flower. Toxic. Purgatory, CO, US. Wild. 1996-07-26.
Aconitum columbianum Nutt.
Engl.: Columbian monkshood, Columbian aconite
The copyright information is here.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.
http://www.henriettes-herb.com - Copyright 1995–2019 Henriette Kress.