Phylloclades are

Leaf modifications

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One internode long stems

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Modified petioles

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Green succulent stems of indefinite growth

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Solution

The correct option is D Green succulent stems of indefinite growth
D. Green succulent stems of indefinite growth
Reason: Phylloclades are green, photosynthetic, often succulent stems of indefinite growth. Leaves present in it are caducous. Phylloclade formation is an adaptation for xerophytes (plants found in dry habitats) e.g. Opuntia, Casuarina etc. These are very similar to cladodes.

Suggest Corrections

	Phylloclade	Cladode
(i)	Both main stem and branches are modified to function like leaves.	Only the branches are modified to take over the function of leaves.
(ii)	Phylloclade has limited or definite growth.	Cladode has unlimited or indefinite growth.
(iii)	It consist of several nodes and internodes.	It is usually one internode long
(iv)	True leaves are commonly caducous.	True leaves are either reduced to scales or modified to spines.
(v)	Example: Rescus aculeatus, Asparagus etc.	Example: Opuntia, Euphorbia royleana etc.