Blue-eyed grass (Sisyrinchium angustifolium) flower closeup, with six blue tepals (3 sepals &amp; 3 petals) veined and prong-tipped, darkening toward the yellow center and 6-fold yellow stigma.  Near New Hope Creek, Duke Forest Korstian Division, Durham, North Carolina 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>