in Tissues in Plants by

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Open Vascular Bundle

Closed Vascular Bundle

Contains an interfascicular cambium in between phloem and xylem.

Interfascicular cambium is absent.

Phloem and xylem are not in direct contact with each other.

There is direct contact between phloem and xylem.

Secondary phloem and xylem are formed in between the primary phloem and xylem.

Such activity is absent.

These are present in dicot and gymnosperm stems.

Present in leaves and monocot stems.

These are either collateral or bicollateral.

These can be collateral or concentric.