Radishes are in the Brassica family, the same as Kale! The most common edible part of the radish is the root.
The botanical species name is Raphanus Sativus. Favorite varieties are French breakfast, Watermelon, and Easter Egg (multicolored).
If a radish stays in the ground too long in hot weather, it can get very spicy - but the spicy flavor protects it from pests like aphids, cucumber beetles, ants, and humans! If you bite into a spicy radish, you can say “That radish bit me back!”