Differences between rhizome and bulb ...

A rhizome is:

"The rhizome (from rizo- , root, with the suffix -oma , bulge) is a modification of drum with main reserve function. It is swollen, underground with a generally horizontal course. "

A bulb is:

"Characteristic among monocotyledonous plants, Alliaceae Amaryllidaceae, Iridaceae), the bulb is a vegetative propagation organ (agamic, non-sexual) which also performs a resistance function allowing the overcoming of climatic conditions - unfavorable environments (cold, drought, etc.) "