A Pocket Plum gall (Taphrina pruni) on Blackthorn (Prunus spinosa). Eglinton Country Park, Ayrshire, Scotland.
<a href="//commons.wikimedia.org/wiki/User:Rosser1954" title="User:Rosser1954">Rosser1954</a> Roger Griffith
2010-02-16
<span class="int-own-work" lang="en">Own work</span>