What is the defining characteristic of palmate compound leaves?

The defining characteristic of palmate compound leaves is that the leaflets spread from a single point at the end of the petiole, resembling fingers extending from a palm. This arrangement creates a distinctive structure that visually resembles the shape of a hand. The unique formation allows for efficient sunlight capture and aids in photosynthesis, as the leaflets can be oriented in various directions to maximize exposure.

While other arrangements of leaflets can occur in different types of compound leaves, palmate leaves specifically emphasize this single-point origin, differentiating them from pinnate leaves, where leaflets are arranged along a central stem or rachis. Understanding this distinct arrangement helps in identifying plant species and understanding their morphological adaptations within their environments.