The is in the alder that it is : winter bud that differs with birch has a power, the nutlet that provides a wing is dispersed after, the Guo Bao of 毬 fruit shape still stays on branch.

• 与桦木不同之处为:桤木的冬芽有柄,具翅的小坚果散布以后,毬果状的果苞仍留在树枝上。