Bulbs-Onions and garlic reproduce using these.
Corms-Gladiolus and freesia plants have these special stems that are short and fleshy with a bud for growth of new stems and leaves and an area on the bottom for root growth.
Rhizomes-Banana trees and bamboo have these horizontal stems that can divide and grow in several directions at once.
Stolons-Strawberry plants and Bermuda grass have these stems that produce other stems and leaves on top and roots on bottom.
Tubers-These are fleshy, enlarged stems like the potato.