S.R.MAGLIONE / SCIENCE PHOTO LIBRARY S.R.MAGLIONE / SCIENCE PHOTO LIBRARY
Macrophotograph of leaf veins of the Green Arrow plant Peltandra virginica. A main central vein is seen; it contains vascular bundles which act as a tube system transporting liquid food and water to and from the leaf and through the plant. Smaller veins branch diagonally off the main vein, and these branch in turn creating a fine network. This arrangement of veins, branching diagonally from a central vein, is one of the distinguishing characteristics of dicotyledonous plants.
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