A vascular leaf characterized by particular anatomical traits namely, wax and trichome distribution, presence or absence of epidermal cell types, cell wall shape and biochemistry. [source: GR:Pankaj_Jaiswal, MaizeGDB:lv]
Many species have juvenile leaves at the base of the stem, adult leaves at the apex, and transition leaves in between. In maize, juvenile leaves are at the tip of the stalk (stem), which differentiates first, with adult leaves at the base, while other grasses may have other arrangements. In some plants the juvenile leaves may go on to establish as adult leaves.