adult vascular leaf hoja adulta (Spanish, exact) 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. plant_anatomy PO:0006340 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. PO_GIT:371 維管束系の成葉 (Japanese, exact) vascular leaf