Axillary bud

Terminal buds on growing shoot of young Cook Pine can be clearly seen

The Axillary bud is an embryonic shoot which is between the stem and petiole of a plant.

Axillary buds can be used to tell the different kinds if the plant is single-leafed or multi-leafed. Simply count the number of leaves after an axillary bud. If there is only one leaf, then the plant is thought single-leafed, vice versa.