Dahlias, Gladiolas, and Lilies - Oh My!

Saturday, June 15, 2013
• 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.
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