Interfascicular cambium develops from the cells of:
Xylem parenchyma
Endodermis
Pericycle
Medullary rays
Correct answer: Medullary rays
Solution
Interfascicular cambium arises from parenchymatous cells of the medullary rays, which become meristematic and join the intrafascicular cambium. This helps form a continuous cambial ring in dicot stems.