Aspen leaves are the flat, roundish leaves of the aspen tree, known for their vibrant green color in spring and summer. They have a distinctive shape with serrated edges and a smooth surface. In autumn, aspen leaves turn brilliant shades of yellow, gold, and orange, creating stunning landscapes in forests. These leaves are attached to the tree by a unique flattened petiole, allowing them to flutter in the wind. This movement creates a soothing rustling sound, which is characteristic of aspen groves. The leaves play a crucial role in photosynthesis, helping the tree convert sunlight into energy.