What is a key distinguishing feature of compound leaves?

A key distinguishing feature of compound leaves is that they have multiple leaflets. In a compound leaf, each leaflet is a distinct section that can function somewhat independently in photosynthesis, gas exchange, and other physiological activities. This structure allows for more effective light capture and can lead to increased photosynthetic efficiency.

The ability to have multiple leaflets can also aid the plant in reducing damage from wind or heavy precipitation, as the segmented structure can help to dissipate forces and reduce the chance of breakage compared to simple leaves with a single blade.

Additionally, the leaflets are attached to a central stalk called the rachis, which distinguishes compound leaves from simple leaves that consist of a single blade. Understanding this characteristic is essential for identifying different plant species and understanding their adaptations and evolutionary significance in various environments.