The term 'bulbous plant part' refers to two different parts of a plant, the CORM and the tulip. A CORM is a short, vertical, underground stem that stores food for the plant and is often found in plants such as crocuses and gladioli. A tulip is a type of flower that has a bulb-like structure at its base. The bulb stores nutrients and water for the plant and helps it survive during periods of dormancy.