Perennating organ

Perennating organs are usually modified vegetative parts of a plant body such as the stem, root, leaves or whole shoots.

They are often developed underground and able to store food. They can survive adverse environmental conditions and enable the buds of perennating organs to grow rapidly into new plants using the stored food. These plants usually die down in autumn but grow again the following spring. The organs remain dormant in the soil after the rest of the plant has died. Plants possessing perennating organs can survive from year to year. Hence the word "perennating", meaning "through the year". Examples of plants with perennating organs are: the onion, crocus, carrot, iris, potato and dahlia.