5.Morphology of Flowering Plants
medium

Phyllode is present in

A

Asparagus

B

Euphorbia

C

Australian Acacia

D

Opuntia.

(AIPMT-2012)

Solution

(c) : In several species of Acacia found in the deserts of Australia the bipinnate lamina is absent. Instead petiole and part of the rachis become flattened into sickle­shaped structure for performing the function of food synthesis. Such a flattened petiole which carries out the functions of the lamina is called phyllode. Formation of phyllode is a mechanism to reduce transpiration because $(i)$ it is vertically placed and $(ii)$ has fewer stomata.

Standard 11
Biology

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