Sierra stickseed (Hackelia nervosa), loose, older flowerheads next to stream.  At about 9200ft along High Trail (part of Pacific Crest Trail) from Agnew Meadows to Agnew Pass, Ansel Adams Wilderness, California.
<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>