"I feel very confidant having look at banana rhizomes of all > sorts and read a lot of the literature, that all Musaceae and > Zingiberales have rhizomes. Some are very odd, but so is their > foliage, flowers, leaves etc." In other words, nor in behaviour, habit or looks have they anything to do with bulbs in a very lato sensu, being common herbaceous perennials from miles away.