16 Black Alder Alnus glutinosa
Also known as the common alder or European alder. It is native to most of Europe, Western Asia and North Africa. It is usually found on the edges of forests, there not being enough light for seedlings on the forest floor. The timber is very resistant to water and was used as foundation timbers in Venice and medieval castles. The male catkins and female 'cones' can be seen in early spring.