Examples are Malus spp.
Corms are solid masses of stem tissue.
They are actually a condensed stem with a bud on top from which the new stem grows. Cormels are small corms which form around the base of a larger corm. Some bulbs such as Hippeastrum spp. Bulblets are small bulbs growing from the main bulb, such as in Hippeastrum spp. Bulbils grow on the stem in the axils of leaves or bracts.