This document provides an identification key to determine unknown plant species. It outlines different types of keys that use dichotomous or multichotomous questions to narrow down species. The key then lists characteristics to observe like leaf type (broad, needle), arrangement (opposite, alternate), margins, and venation to identify whether a leaf is simple, compound, palmate, or pinnate compound. Users are instructed to observe these traits in an unknown leaf to determine its identity using the key.