Cambium is the layer in plants of actively dividing cells between xylem and phloem tissues. It is also responsible for the secondary growth of roots and stems. There exist two kinds of cambium: vascular and cork cambium. Secondary growth is the result of activity from vascular cambium. Cork cambium is formed from secondary growth because vascular growth usually ruptures the epidermis of roots or stems. The cork cambium also provides the plant with some protection against rough treatment. The cambium consists of undifferentiated cells that have the capability differentiate into many types of cells, depending on where it is located. If a plant is cut through the cambium, the plant may die.