Phyllode(redirected from phyllodium)
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a petiole that is broadened in the shape of a leaf and fulfills the functions of the leaf blade, which is absent or partially reduced. Phyllodes are present in many Australian acacias and in some Australian cassias. Phyllodes characterize a number of plants that grow in the USSR, including Lathyrus missolia. Phyllodes apparently serve as an adaptation to a decrease in transpiration.