A simple leaf is a type of leaf structure that consists of a single, undivided blade. This means that the leaf is not divided into smaller leaflets, making it easy to identify. Simple leaves can come in various shapes and sizes, and they are typically attached to the stem of a plant by a petiole, which is the stalk that connects the leaf to the stem. Examples of plants with simple leaves include maple trees, oak trees, and sunflowers. The arrangement of simple leaves on a stem can vary, with some being alternate, opposite, or whorled. Simple leaves play a crucial role in photosynthesis, allowing plants to capture sunlight and convert it into energy.