1. When xylem and phloem form separate bundles, it is called aorial vascular bundle. If the number of auricular vascular bundles is less than five, dicotyledonous plants will have roots.
2. When xylem and phloem form separate bundles, it is called aorial vascular bundle. If the number of auricular vascular bundles is more than six, the plant will be rooted in monocots.