Signature of Carl Adolph Agardh.
Carl Adolph Agardh (signature), vectorized by <a href="//commons.wikimedia.org/w/index.php?title=User:Abi%C3%A1n&amp;action=edit&amp;redlink=1" class="new" title="User:Abián (page does not exist)">David Abián</a>
<a href="//commons.wikimedia.org/wiki/File:Agardhsignaturbearbetad.jpg" title="File:Agardhsignaturbearbetad.jpg">File:Agardhsignaturbearbetad.jpg</a> (derivative work)