Different plant forms are commonly called bulbs, which differ according to their shape. Their appearance is similar to spring onions, although in reality they are real plants. Let's see some substantial differences.
The bulbs are real plants, albeit modified and in miniature. They are in fact provided with a very shortened stem (called "disco" or "girello"), with leaves (the "catafilli") wrapped around the bud, and with roots. In the "tunicate bulbs, the external catafilli have a paper consistency, while those closest to the bud are fleshy and contain the reserve substances intended to support the bud itself when it develops and gives life to leaves and flowers. The" scaly bulbs "such as lilies. instead, they are formed by thickened and triangular scales arranged in an embryonic one on top of the other, like bulbous flowers, for example, hyacinths, amaryllis, scilla, daffodils, tulips.
Tubers and rhizomes
Tubers: they are underground stems that contain a fleshy part, a fundamental part in which the reserve substances are deposited. They have a rather flat shape, compact and solid, they look a lot like our potatoes to which external buds sprout; at the vegetative restart the roots and the aerial parts of the stem develop. Anemones, begonias and of course tuberose are classified as tubers.
The rhizomes: they have an elongated shape of thickened stems and their underground development can also develop on the surface. The buds, which sprout at the end of the rhizomes, grow horizontally, which contributes to the formation of a new portion which contrasts with the other end which will be lost because it has aged. Lily of the valley, lily of the valley, some iris species are rhizomes.
The Cormi O Bulbi-Tuberi: They are small tubers wrapped in their external part by papyrus leaves. In the center we find the bud, which will then develop the aerial part, while in the lower part the root system develops, followed by the formation of bulbils which, once detached from the "mother", will give life to new plants. Gladioli and freesias belong to this typology.