Gender: Female. Usage: Morella is not a popular first name. It is more often used as a girl (female) name. People having the name Morella are in general originating from Ireland, Italy, United States of America.
From Wikipedia, the free encyclopedia. A leaf scar is the mark left by a leaf after it falls off the twig. It marks the site where the petiole attached to the stem. A leaf scar is found where a plant branches. The leaf scar on Ailanthus altissima. Leaf scars are formed naturally at the end of the growing season for deciduous plants when a layer of cells called the absciss layer forms between the petiole and stem. The absciss layer acts as a point of cleavage and the leaf breaks off leaving a cleanly shaped scar.
A leaf is an organ of a vascular plant and is the principal lateral appendage of the stem. The leaves and stem together form the shoot.Foliage is a mass noun that refers to leaves collectively. Typically a leaf is a thin, dorsiventrally flattened organ, borne above ground and specialized for photosynthesis.n ferns and most flowering plants, the mesophyll is divided into two layers: 1  An upper palisade layer of vertically elongated cells, one to two cells thick, directly beneath the adaxial epidermis, with intercellular air spaces between them. 2  Beneath the palisade layer is the spongy layer.