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Being one of the more visible features, leaf shape is commonly used for plant identification. Similar terms are used for other plant parts, such as petals , tepals , and bracts . Oddly pinnate, pinnatifid leaves ( Coriandrum sativum , coriander or cilantro) Partial chlorosis revealing palmate venation in simple leaves of Hibiscus mutabilis
Leaf morphology: Shape, margin and venation. Leaf Parts: – A complete leaf is composed of a blade, petiole, and stipules, but in many plants one or more might be lacking or highly modified. Blade – see lamina. Lamina – the flat and laterally-expanded portion of a leaf blade. Leaflet – a separate blade, among others, of a compound leaf
External leaf characteristics, such as shape, margin, hairs, the petiole, and the presence of stipules and glands, are frequently important for identifying plants to family, genus or species levels, and botanists have developed a rich terminology for describing leaf characteristics. Leaves almost always have determinate growth.
Later authors have modified the classes and have sometimes used leaf length as a simpler measure than leaf area if the leaf shape is approximately an ellipse. For example, L.J. Webb [3] used size classes: Microphyll: less than 2,025 square millimetres; Notophyll: 2,025–4,500 square millimetres; Mesophyll: greater than 4,500 square millimetres
Sponge Leaf Tree. With this easy-peasy craft, your kids won't be painting their own leaves. Instead, they'll be stamping them! Have them trace simple leaf shapes onto sponges.
Narrowing gradually. See also Leaf shape. auricle An ear-shaped lobe, particularly a small, roundish, lateral appendage of a leaf or leaf-like organ. auriculate Attached at the base with ear-shaped appendages (auricle s). See also Leaf shape. autogamous Self-pollinating, self-fertilizing – in flowering plants awn 1. Any long, bristle-like ...
There is a marked difference in shape between the first dark green "seed leaves" and the lighter second pair of leaves. The organs and tissues produced by a young plant, such as a seedling, are often different from those that are produced by the same plant when it is older. This phenomenon is known as juvenility or heteroblasty. For example ...
Fruitcake. Step one of a fruitcake is soaking pounds of dried fruit until it's plump and filled with bourbon. That takes up to 12 hours. Step two is simple: making and baking the loaves.