What are Radial, Conjoint, Closed and Open Vascular bundles

ARRANGEMENTS IN VASCULAR BUNDLES




RADIAL:

When xylem and phloem in a vascular bundles are arranged in alternate manner on different radii then such arrangement is called Radial arrangement.

CONJOINT:

Xylem and Phloem when arranged on same radii in the vascular bundles is considered as Conjoint.

OPEN:

When xylem and phloem are seperated by vascular cambium. Such arrangement with cambium is considerd as Open vascular bundles as in Dicots.

CLOSED: 

Vascular cambium is absent in between the xylem and phloem such arrangement of vascular bundles with no cambium is called Closed vascular bundles as in Monocots.

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