The term CROCUS BULB is a type of bulbous plant that belongs to the Iridaceae family. It is also known as a CORM, which is a short, vertical, swollen underground stem with a papery outer layer. The CORMS are usually 4-5 letters long and produce flowers in the spring. The flowers are typically irises, which are 4-5 letters long and come in a variety of colors. The IRIS is the most common flower associated with the crocus bulb.