Western St. John's wort (Hypericum formosum), stems with opposite simple leaves, flower, bud, and developing capsules.  At 5,400 ft (1,600 m) along Lower Rock Creek, Mono County, 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>