Fossil plants reveal the evolution of green life on Earth, but the most abundant samples that are found—fossil leaves—are also the most challenging to identify. A large, open-access visual leaf ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Leaf shapes play an important role in tree identification, providing key ...

Leaves are food factories for the tree. Powered by sunlight, the green substance in leaves called chlorophyll, use carbon dioxide and water to produce life-sustaining carbohydrates (sugars). The ...