Full development of the first leaf is known as V1. The number of leaves that are completely developed determine the vegetative stage the plant is at. Although there are two leaves present on this plant, it is technically not at stage V2. Full development is achieved when the collar of the leaf is fully visible. The collar is found at the base of the leaf. This will be explained in further detail at a later stage. Another attribute of this stage is the uniqueness of the leaf. The first leaf on a corn plant has a rounded end, known as the flag leaf. This is the only leaf on the plant that exhibits this trait. When determining the number of leaves on a corn plant, the flag leaf should be the first leaf counted.