A strand of primary tissues found within the stem of a plant and consisting of xylem and phloem, along with cambium.
Fusiform initials — These cells are elongated with tapering ends, and their size varies greatly.
Such vascular bundles are of two types: a Amphivasal or Leptocentric : In amphivasal concentric vascular bundles, the xylem completely surrounds the phloem.
This is found in monocot stems.
The position of vascular bundles relative to each other may vary considerably: see stele.
It consists of sieve tubes, companion cells, phloem fibres and phloem parenchyma.