Lv 5. In general, so there's only one term for it…not too deep. In peltate leaves, the petiole attaches to the blade inside from the blade margin. 6 years ago. Leaf Anatomy What defines a leaf? Formerly Peter S. Lv 7. Stephanie. Favorite Answer. The first example using 2 cm grid paper shows both basic leaf parts (blade and petiole). 7 years ago. Rhododendron leaves. When this is actually the case, the leaves are called "perfoliate", such as in Claytonia perfoliata. Favorite Answer. Relevance. I think you're referring to the waxy cuticle, maybe the upper epidermis.Hope this helps :D. 0 0. geetasankar1. what's the surface of a leaf called? Leaf Definition. Thanks. 1 0. Leaves also have stipules, small green appendages usually found at the base of the petiole. They allow water and other materials to enter and exit the leaf. It is mostly found above the ground and remains attached to the stem. The epidermis is the outermost of the three layers that make up the skin, the inner layers being the dermis and hypodermis. A leaf is a plant organ that is flat, thin and usually green in color. What is the upper surface of the plant leaf called? What is the top surface of a leaf called? Under the proper circumstances, lateral buds can grow into a branch, a shoot with flowers, or a modified branch such as a thorn. In general, leaves are thin, flat organs responsible for the photosynthesis of the plant.Although photosynthesis typically only occurs on the upper surface of the leaf, it can occur on both sides in some plant species.Leaves … Answer Save. Answer Save. In some Acacia species, such as the Koa Tree (Acacia koa), the petioles are expanded or broadened and function like leaf blades; these are called phyllodes. In calculating surface area, we traced the maple leaf onto 2 cm, 1.5 cm, 1 cm, and 0.5 cm grid paper. The small openings in the surface of a leaf are called stomata. 0 0. In botany, a stoma (plural "stomata"), also called a stomate (plural "stomates") is a pore, found in the epidermis of leaves, stems, and other organs, that facilitates gas exchange. An organ is a leaf, and not some other organ, if there is a lateral bud in the angle above where the leaf stalk attaches to the stem (called the axil of the leaf). Leaves that do not have a petiole and are directly attached to the plant stem are called sessile leaves. 0 0. moosa. 7 years ago. The outer surface of the leaf has a waxy coating called a cuticle which protects the leaf. Figure %: Cross-Section of a Leaf Overall, it is to the plant's advantage to maximize the gas exchange and sunlight trapping surface while keeping leaf thickness to a minimum so that gases can diffuse easily throughout the cells of the leaf (a process that occurs readily only when there are only a few layers of cells present). Formerly Peter S. Lv 7. 3 Answers. Evergreen plants, like the rhododendron, keep their leaves in winter, so their leaves need to be tough to survive. Lv 5. Some species have red undersides, while others have a feltlike down to retain moisture and ward off insects. The leaves have a waxy surface, which helps lock in moisture. Answer: Upper Epidermis. ... Monocotyledons such as onion, oat and maize may have about the same number of stomata on both leaf surfaces. 3 Answers. lamina. In this process, carbon dioxide and water in the presence of chlorophyll (the green pigment) and light energy are changed into … The epidermis layer provides a barrier to infection from environmental pathogens and regulates the amount of water released from … The term leaf refers to the organ that forms the main lateral appendage on the stem of vascular plants. Relevance. The leaf blade is the primary photosynthetic surface and the petiole is the leaf stalk connection to the stem. upper (adaxial) and lower (abaxial) surfaces. 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