A catkin is a type of inflorescence (flower cluster) that's typically long and slender, with small, densely packed flowers. Willow trees produce both male and female catkins, which look quite similar but have different functions.
A catkin is a type of inflorescence (flower cluster) that's typically long and slender, with small, densely packed flowers. Willow trees produce both male and female catkins, which look quite similar but have different functions.