The broader family of vegetables that grow underground includes roots such as carrot, turnip, parsnip, beet, salsify and radish, and tubers such as Jerusalem artichokes and, the most universal of all, the potato which is dealt with separately. More exotic examples include taro root. Most roots and tubers can be substituted for each other and they store well without refrigeration. There is a marked difference between those newly harvested, often when small and young, and those intended for storage, which are larger and more mature.