A radish is an edible root vegetable of the Brassicaceae family. People eat radishes all over the world. It was first grown in Europe in pre-Roman Empire|Roman times. Radishes are usually eaten as a crunchy salad vegetable. There are many varieties of radishes. Some radishes are different in size, flavor, color and the length of time they take to grow.
R. raphanistrum subsp. sativus
It has a somewhat hot taste, rather peppery. This keeps some herbivores away, or limits the amount they eat. It acts as a defence against herbivory.