(b): Lateral meristems are the meristems which are present along the lateral sides of stem and roots. They divide only in radial direction. Intrastelar or vascular cambium ring formed by intra­fascicular (also called fascicular) and inter­fascicular cambium? and cork cambium (phellogen) are examples of this type of meristem. These meristems are responsible for increase in girth of stem and roots.