Single-stem groundsel (Senecio integerrimus), closeup of flowerhead showing the black-tipped bracts diagnostic of this genus. At 10,400 ft (3,200 m) along trail around Heart Lake, Little Lakes Valley, John Muir Wilderness, Sierra Nevada USA.
<a href="//commons.wikimedia.org/wiki/User:Dcrjsr" title="User:Dcrjsr">Dcrjsr</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>