Common Alder (Alnus glutinosa)
A native species that grows alongside streams, fens, carrs, lakes etc in all parts of the UK. Very fast growing and a nitrogen fixer, improving the soil. It is sometimes planted to enrich poor ground and to prevent erosion of river banks. It grows well in water logged soils and boggy land. The wood is yellow when seasoned and works easily. It was once used to make clogs and mill-wheel cogs. Its natural habitat of watery places meant that it was traditionally used for sluices, water troughs and piles, while the dry wood makes good charcoal.