used for afforestation on infertile soils which it enriches by means of its nitrogen-fixing nodules, while not growing large enough to compete with the intended timber crop. A. sinuata can add 20 kg of nitrogen per acre (50kg/hectare) per year to the soil. Alnus viridis leaves have been used in the traditional Austrian medicine externally or internally as tea for treatment of infections and fever. References External links Alnus viridis - information, genetic conservation units and related resources. European Forest Genetic Resources Programme (EUFORGEN) alnobetula Trees of North America Trees of Europe Trees of Asia Flora of the Alps Flora of the Carpathians