Photograph of the bark of the River Birch (<i><a href="//commons.wikimedia.org/wiki/Category:Betula_nigra" title="Category:Betula nigra">Betula nigra</a></i>).  Photo taken at the <a href="https://en.wikipedia.org/wiki/Tyler_Arboretum" class="extiw" title="en:Tyler Arboretum">Tyler Arboretum</a> where its species was identified by tag as accession #XX-1999-128.
Photo by and (c)2016 Derek Ramsey (<a href="https://en.wikipedia.org/wiki/User:Ram-Man" class="extiw" title="en:User:Ram-Man">Ram-Man</a>)
CC BY-SA 4.0
<span class="int-own-work">Self-photographed</span>