A seed that form in clusters, often treated as a nut in cooking. The edible ‘nut’ is green and surrounded by a beige shell. 

Most likely originated from central Asia and the Middle East.  

A wave of immigrants to the U.S. from the Middle Eastern in the late 19th century introduced pistachios to the country.

Pistachios contain approximately 18% protein.

“America’s Pistachio Industry Came From a Single Seed” by Anne Ewbank (2019) 

https://www.atlasobscura.com/articles/where-are-pistachios-from 

“Are Pistachios Nuts?” by Elise Mandl (2020) https://www.healthline.com/nutrition/are-pistachios-nuts 

New Oxford Book of Food Plants by John Vaughan et al. (2009)