Black alder, Common alder, Alnus Glutinosa, Owle
Use the dried bark except for emetic purposes, as the fresh bark of the Alnus glutinosa plant will cause vomiting,
A decoction of the bark makes an effective gargle for sore throats especially for pharyngitis. The powdered bark and the leaves have been used as an internal tonic and astringent The bark also as an internal and external hemostatic against haemorrhage (stops bleeding).
You can boil the inner bark in vinegar to produce a useful external wash for lice and skin problems such as scabies and scabs.
It can also be used to clean your teeth.