Dried goji berries. Goji, goji berry, or wolfberry (pinyin: gǒuqǐ) is the fruit of either the Lycium barbarum or Lycium chinense, two closely related species of boxthorn in the nightshade family, Solanaceae. The family also includes the potato, tomato, eggplant, belladonna, chili pepper, and tobacco. The two species are native to Asia.