Catkin, noun. A unisexual inflorescence, consisting of rows of apetalous flowers ranged in circles along a slender stalk; the whole forming a cylindrical, downy-looking, and generally pendant part, which falls off in a single piece after flowering or ripening; as in the willow, birch, poplar, pine, hazel, etc. (Oxford English Dictionary)


Hazel Catkin
( Corylus Avellana )