<i><a href="//commons.wikimedia.org/wiki/Pleurothallis_titan" title="Pleurothallis titan">Pleurothallis titan</a></i>. Now <i>Acronia titan</i> by Luer, but IOSPE still calls it Pleuro...I'll agree with Luer overall on the heart-leaved ones.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/25609635@N03">Elena Gaillard</a> from New York, USA
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/25609635@N03/2410807457/">Pleurothallis titan</a>
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<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:Orchi" title="User:Orchi">Orchi</a></li></ul>