Horsemint (Agastache urticifolia), closeup of flowerhead.  At about 9000ft along the High Trail (part of Pacific Crest Trail) from Agnew Meadows to Agnew Pass, Ansel Adams Wilderness, CA.
<a href="//commons.wikimedia.org/wiki/User:Dcrjsr" title="User:Dcrjsr">Dcrjsr</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>