No. 3563. Leaves. 37 Color Photomicrographs. 1. Leaf epidermis of Tulipa, surface view of stomata 2. Stomata, l.s. of Iris 3. Stomata, l.s. of Zea mays 4. Iris, t.s. of isobilateral leaf 5. Allium schoenoprasium, chive, t.s. folding leaf 6. Zea ma