Scientists differentiate between 'bulbs', 'corms', 'tubers' and 'rhizomes' but to most gardeners they are all the same thing and they serve the same purpose – they are planted when they are dormant and magically spring into life.
It may not be necessary to know whether you are planting a bulb or just something similar but it certainly helps to know when to plant it. Planting a summer-flowering, tender bulb in the autumn is a recipe for disaster as is planting a spring flowering bulb in March. These quizzes will help point you in the right direction.
Don't forget to click on any of the pictures to expand them and take a closer look.