Betulaceae / birches

 
    1. leaves and nutlets held in cylindrical catkins of Betula maximowicziana
    2. leaves and nutlets held in a cylindrical catkin of Betula ermanii
    3. bark of Betula platyphylla var. japonica  
    4. female catkins of Betula platyphylla var. japonica 
    5. male catkins of Betula platyphylla var. japonica