"Members of the NIghtshade Family" by Drew at Toothpaste for Dinner.
It's true, the Nightshade family (Solanaceae) contains several economically important species, although its doubtful Steve is one of them. Members of the Solanaceae make a number of different alkaloids (nicotine for example) - some toxic, desirable, or both.
Within the family, the genus Solanum include species that provide us eggplants, potatoes, and tomatoes. Nicotiana is tobacco, Capsicum give us bell peppers and chili peppers, Petunia is often cultivated for their flowers, and Atropa belladonna is belladonna.