The Scottish Government consultation on the plan began yesterday and will run for three months, managed by Forestry Commission Scotland. The Scots pine is the early favourite.
The idea of a national tree came from Alex Hamilton, a wildlife enthusiast who lives close to the Botanic Gardens in Glasgow. He brought his campaign to the Scottish Parliament in January and received cross-party support from MSPs. He also has the support of the Royal Society for the Protection of Birds Scotland, Trees for Life, the Woodland Trust Scotland, the Scottish Wildlife Trust and the John Muir Trust.
Mr Hamilton said a national tree would be a "symbolic statement of a nation's aspirations and its commitment to woodland".
Native trees include Scots pine, rowan, aspen, silver birch, ash, yew, hawthorn, hazel and holly but a non-native tree can be chosen.