7 TREES EVERY SURVIVALIST SHOULD KNOW 1. White Birch The white birch has white, paper-like bark that peels off in thin furls. The leaves are small, oval-shaped, toothed, and have a pointy tip. Why they're important: * The bark works well as a firestarter * The sap is sweet and drinkable * The bark can be brewed to make wintergreen flavored tea * Th