What is a terminal leaflet?

A terminal leaflet refers to the leaflet located furthest from the bud on a compound leaf. In a compound leaf structure, leaflets are joined together, and the terminal leaflet is the one that sits at the end of the leaf’s petiole, which is the stem that supports the leaf. This positioning distinguishes it as the last leaflet in the arrangement.

Understanding the position of the terminal leaflet is important in botanical classification and identification, as different plants may have unique arrangements of their leaflets. Identifying the terminal leaflet helps in recognizing specific types of compound leaves and their growth habits.

The other options do not accurately define a terminal leaflet. The first leaflet to appear on a branch would refer to an earlier stage in growth rather than its position on the leaf. Similarly, the smallest leaflet on a compound leaf does not denote its position but rather its size. Lastly, a leaflet that has fallen off does not correspond to the definition of a terminal leaflet, as it is no longer part of the leaf structure.