Grass-of-Parnassus (Parnassia californica) flower detail, showing the open bowl of five white, veined petals, central ovary, five large fertile stamens between the petals, and a wide, fringed, yellow, infertile stamen centered at the base of each petal.  At 10,300 ft (3,100 m) by Shell Lake, Mine Creek Valley, near Tioga Pass, 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>