This kind of leaf edge can come in several shapes such as linear (picture), deltoid, eliptical, ovate and more. For example, in table T the rows with a KEY of 'config' and 'ctx' have descendents (children and grandchildren) and are therefore not leaf nodes in that context. A cordate leaf has the base rounded in the shape of a heart. An angle that is less than 90º with straight lines and having a point. ... A heart shaped leaf with a sharp apex. A typical leaf consists of three main parts: leaf base, petiole, and lamina. Compound Leaf. Compound: The leaf is separated into distinct leaflets, each with its own small petiole (but without an axillary bud). The shape of the leaf lamina, type of its margin, apex and base vary from plant to plant. Studying leaf shape and the arrangement of leaves on a stem is the most common way of identifying a tree in the field during the growing season. This is an example of a decompound leaf structure, meaning it is divided three or four times. leaf blades dull or barely sublustrous, and flowers and fruits solitary or in solitary, peduncled cymes on the branchlets of the current season (vs. Leaf blade: The broad, expanded part of a leaf. Compound Leaf. Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. They range in size from 28 mm to 100 mm with females usually being larger than males. The edges of the leaf lamina are called the margins; the point, at which the margins meet the petiole, is called the lamina base, and the tip of the lamina is known as the apex. Leaflet: One of the parts of a compound leaf.Leaflets do NOT have axillary buds. Examples : Castanopsis indica, Quercus dentata (Fagaceae) etc. I. aquifolium, with the leaf blades highly lustrous, especially adaxially, and flowers and fruits usually clustered, produced from the axils on branches of the previous season). The entire margin leaf has no serrated edges, and is composed by one continuous, smooth surface around the whole edge of the leaf.. Leaf insects (Phyllium philippinicum) have broad, flat bodies and appear as leaves. Crenated Leaf. The leaf is attached to the stem by the leaf base (hypo-podium) and may bear two lateral small leaf-like structures called stipules. A leaf with many notches. Acute Leaf Apex. The picture below is a eucalyptus leaf which are eaten by many animals, but are particularly known for their … Cordate Leaf. Petiole: The stalk of a leaf. The term acute is most often applied to apices, but it is sometimes used for bases where it refers to a wider base than cuneate. Leaf margins-The shape of the margin of leaf lamina or leaf blade is dependent on the extent to which the leaf blades are subject to varieties of incisions, cuts or irregularities or completely free from them. McSush/Wikimedia Commons/CC BY 3.0. 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