Shasta knotweed (Polygonum shastense), closeup of pink and white flowers.  In 20-Lakes Basin, Hoover Wilderness, California USA.
<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>