A cactus growing along walls built around trails through the scrub in the Yucatán peninsula. Apparently <i>Acanthocereus pentagonus</i> is now known as <i>Acanthocereus tetragonus</i>, see <a rel="nofollow" class="external text" href="http://cactiguide.com/cactus/?genus=Acanthocereus&amp;species=tetragonus">The Cacti Guide</a>
Jim Conrad
2008-08-25
<p>JIM CONRAD'S NATURALIST NEWSLETTER. Written in Sabacché and issued from a
ciber in nearby Tekit, Yucatán, MÉXICO
</p>
<ul><li><a rel="nofollow" class="external free" href="http://www.backyardnature.net/n/08/080825.htm">http://www.backyardnature.net/n/08/080825.htm</a></li>
<li><a rel="nofollow" class="external free" href="http://www.backyardnature.net/n/08/080825cc.jpg">http://www.backyardnature.net/n/08/080825cc.jpg</a></li></ul>