Buds, Leaf
These consist of rudimentary leaves, surrounding a growing vital point, and appear like a collection of scales arranged symmetrically one above the other. Leaf-buds universally originate in the horizontal or cellular system, and are formed under the bark at the extremity of the medullary rays, and at the margin or on the surface of leaves, whether perfect or rudimentary. Deciduous trees lose their leaves, but in the axil of each a little Bud previously forms, from which fresh leaves expand the following spring. In some cases, as in the Horse-chestnut, the Buds are covered with a gummy exudation. In Privet-trees, Leaf-buds are generally smaller and more elongated than Flower-buds.