Mexican, Spanish, Caribbean, African, Indian, and East Asian.

gooseberries (cape gooseberries are nightshades) peppercorns yam sweet potato garlic onion turmeric ginger chive cumin basil horseradish wasabi clove mustard seed galangal     Guinea pepper sansho Tasmanian mountain pepper   http://noarthritis.com/cookbook.htm

Fantastic article explaining some of the science: http://www.westonaprice.org/food-features/nightshades The poisonous compounds in and drugs from nightshades include lycopene, calcitriol, solanine, nicotine, atropine, scopolamine, hyoscyamine and capsaicin. excerpts: regarding potatoes “Potatoes naturally produce solanine and chaconine, a related glycoalkaloid, as a defense mechanism against insects, disease and predators (humans included). Potato   Read More ...

from http://www.frontiercoop.com/prodlist.php?ct=frgourmet Sarah P in her post (http://vegetalion.blogspot.ca/2010/11/how-to-replace-nightshades-part-2.html) says that high-quality peppercorns like the ones below will often add flavour that can replace hot peppers:   Cubeb – Piper cubeba Also called tailed pepper due to the attached fruit stem, our organic cubeb pepper is grown in Indonesia and offers a   Read More ...