|• True bulbs have 5 parts. Roots grow from the basal plate under the fleshy storage scales wrapped in a papery tunic. True bulbs also have shoots and lateral buds – tulip, daffodil, and onion.
• Lilies are almost true bulbs, but they are naked. They have no tunic layer and cannot last long out of the soil.
• Corms are modified stems – like gladiolus and crocus bulbs. If you cut a bulb in half crosswise and there re no rings, it’s likely a corm.
• Tubers have no tunics and no basal plate, but plenty of eyes, dot the surface to sprout roots or shoots on tubers of caladium, anemone, and potatoes.
• Tuberous roots have modified stems and roots – plants like dahlia, gloxinia, begonia, and sweet potato.
• Rhizomes are underground stems that store energy and have growing points. Roots and shoots emerge from rhizomes that may continue underground or grow above ground.
• Fleshy roots describe peony and daylily storage organs, which are often categorized as bulbs and perennials.