What "nightshade" means in gardening

Nightshade is a term used to describe a family of plants that includes over 2,800 species. The family Solanaceae, commonly referred to as the nightshade family, includes many popular vegetables such as tomatoes, eggplants, and peppers, as well as some poisonous plants like belladonna and jimsonweed. These plants contain alkaloids that can be toxic if consumed in large quantities, and some people may also be allergic to them.