EVERYDAY SCIENCE

Detailed explanation-1: -Replum is a thin false septum present in the ovary of flower of mustard. Mustard fruit is caleld siliqua . It develops from a bicarpellary, syncarpous, superior ovary which is unilocular but becomes bilocular due to a false septum called replum.

Detailed explanation-2: -Hence, Replum is present in the ovary of the Mustard flower.

Detailed explanation-3: -It is a thin wall or valve in some fruits. It is a frame like a placenta through which the septum stretches. During dehiscence, the valves fall away hence it is also called the false septum. Example of plants in which replum is present includes siliques and certain legumes, Cruciferae, Papaveraceae, and Mimosa.

Detailed explanation-4: -Thus, replum is a characteristic feature of the family Brassicaceae or Cruciferae.

Detailed explanation-5: -Complete answer: Brassicaceae family has a formation of a false septum that converts one chambered ovary into two-chambered ( basically separates the two valves of some fruits from which the valves fall away at maturity).