What defines a compound leaf?

A compound leaf is defined as one that consists of two or more leaflets that are attached to a single stalk, known as the petiole. This structure allows for multiple leaflets to emerge from one point on the stem, creating a more complex leaf structure compared to a simple leaf, which has only a single blade.

The presence of multiple leaflets on one stalk enables the plant to effectively gather sunlight while maintaining flexibility and adaptability in various environmental conditions. This can be advantageous for light capture, reducing damage from wind or rain, and promoting overall plant health.

In contrast, a leaf made up of a single leaflet refers to what is categorized as a simple leaf, while a leaf that grows directly from the stem without a stalk is commonly referred to as a sessile leaf. The description of a leaf with a jagged edge pertains to leaf margin shapes but does not align with the structural definition of a compound leaf. Therefore, the defining characteristic of a compound leaf is its configuration of multiple leaflets attached to one main stalk.