Green Elfcup or Green Wood Cup <i>Chlorociboria sp.</i>, Family: Heloteacae, Location: Germany, Ulm, Wiblingen. Possible species <i>Chlorociboria aeruginascens</i> or <i>Chlorociboria aeruginosa</i>. Personally I think <i>C. aeruginascens</i>.
<a href="//commons.wikimedia.org/wiki/User:Holleday" title="User:Holleday">Holger Krisp</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>