Aland Post will release a stamp on forests on 9th May 2011.Around 60 % of Åland is covered by forest. More than 40 varieties of trees and shrubs can be found in the Åland forests, roughly speaking. Pine-forests dominate the northern parts of Åland, whereas the southern parts consist of deciduous forests. On main Åland, we mostly find mixed forests.Noble trees such as ash, oak, elm, maple and lime tree are relatively common, ash being the most common species native to Åland. Other common types of deciduous trees are birch, alder, aspen, rowan, Swedish whitebeam, bird cherry and Finnish whitebeam.