Sargent's campion (Silene sargentii), showing flowers with striped, swollen calyx and 5 unevenly "pinked" petals. 
<ul><li>At about 11,000ft on the edge of the Dana Plateau, Ansel Adams Wilderness, Sierra Nevada mountains USA.</li></ul>
<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>