Seed of Corydalis cava (Papaveraceae) with a white or yellowish appendage called an elaiosome. This fat body attracts ants, which carry the seed to their nest. Seed dispersal by ants is known as myrmecochory.
<a href="//commons.wikimedia.org/w/index.php?title=User:Hans_Stuessi&amp;action=edit&amp;redlink=1" class="new" title="User:Hans Stuessi (page does not exist)">Hans Stuessi</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>