About Phyllode with diagram .

Phyllode: In Acacia the petiole or any part of the?rachis becomes flattened or winged taking the shape of the leaf and turning green in colour. This flattened or
winged petiole or rachis is known as the?phyllode. The normal leaf which is pinnately?compound develops in the young stage, but soon falls off. The phyllode then performs all the functions of the leaf. The wing of the phyllode normally develops in the vertical direction so that sunlight cannot fall on its surface; this reduces evaporation of water. There are about 300 species of Australian Acacia, all showing the phyllode.
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