Ranger's buttons, or swamp whiteheads, (Sphenosciadium capitellatum) flowerheads at 2,900 m (9,500 ft) on the ridge north of Minaret Summit. Shows both in bud and flower the typical carrot-family umbels, but with this species' unusually spherical individual flowerheads (the "buttons").
<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>