A corm, bulbo-tuber, or bulbotuber is a short, vertical, swollen underground plant stem that serves as a storage organ used by some plants to survive winter or other adverse conditions such as summer drought and heat (perennation).
The word cormous is used to describe plants growing from corms, in analogy to the use of the terms "tuberous" and "bulbous" to describe plants growing from tubers and bulbs.
A corm consists of one or more internodes with at least one growing point, generally with protective leaves modified into skins or tunics. The tunic of a corm is formed from dead petiole sheaths, remnants of leaves produced in previous years. They act as a covering, protecting the corm from insects, digging animals, flooding, and water loss. The tunics of some species are thin, dry, and papery, at least in young plants, however, in some families, such as Iridaceae, the tunic of a mature corm can be formidable protection. For example, some of the larger species of Watsonia accumulate thick, rot-resistant tunics over a period of some years; the product is a structure of tough, reticulated fibre. Other species, such as many in the genus Lapeirousia, have tunics of hard, woody layers.
One summer day she went away
Gone and left me, she's gone to stay
She's gone, I don't worry
I'm sitting on top of the world
All the summer worked all this fall
Had to take Christmas in my overalls
She's gone, but I don't worry
I'm sitting on top of the world
Going down to the freight yard
Gonna catch me a freight train
Going to leave this town
Worked and got to home
She's gone, but I don't worry