Multiple choice The open vascular bundle in the stem of cycas is characterised by phloem being sandwiched between xylem cambium present between xylem and phloem xylem being sandwiched between phloem xylem and phloem occurring on different radii Reveal answer Fill a bubble to check yourself B Correct answer Explanation In open vascular bundles, a layer of cambium will be present between the xylem and phloem. This enables secondary growth in it.