Pulvini on a Norway Spruce <i>Picea abies</i> (and generally <i>Picea</i>) shoot; they are lignified, unlike the leaves.
<a href="//commons.wikimedia.org/wiki/User:LivingShadow" title="User:LivingShadow">Simon A. Eugster</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>