This large, edible fruit is known as Sapotillo or as Chupa-chupa.  The species is found in the northwestern Amazon basin and adjacent uplands.   In context at <a rel="nofollow" class="external text" href="http://www.dixpix.ca/Amazon/flora/malves/index.html">www.dixpix.ca/Amazon/flora/malves/index.html</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/92252798@N07">Dick Culbert</a> from Gibsons, B.C., Canada
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/92252798@N07/16540973423/">Matisia (or Quararibea)  cordata</a>