<p>Ernst Heinrich Philipp August Haeckel (February 16, 1834 — August 9, 1919)
FREE TO USE PUBLIC DOMAIN 
Lots more very large gorgeous images @ 
</p><p><a href="//commons.wikimedia.org/wiki/Kunstformen_der_Natur" title="Kunstformen der Natur">commons.wikimedia.org/wiki/Kunstformen der Natur</a>
</p>
( click on images 2 times for huge size )
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/11227158@N04">lolaleeloo2</a> from Bay Area, Ca.
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/lolaleeloo/3215961340/">Flickr</a>