With the American Trees. app you can identify common trees found on the North American Continent via a series of Leaf Shape selections. Along with the Tree Identifier, this app comes with an Encyclopedia and a Quiz game that will help you quickly recognize a tree in the wild. As this app does not require a wireless connection to work, you can take it with you anywhere. Features. Identify Trees you encounter in the wild -Handbook of more than 100 North American Trees -More than 500 richly detailed photos -Learn about tree Taxonomy, Flowers, Fruit, Habitat, Bark, and more -Play the Tree Recognition Quiz Game.