Exodermis of a root is
Hypodermis with fibrous thickenings made of suberin
Hypodermis with fibrous thickenings made of cellulose
Epidermis of root with fibrous thickenings
Endodermis of root with fibrous thickenings made of suberin.
In older roots of dicots and monocots, one or more layers of hypodermal region of cortex develop fibrous thickenings made of suberin.