Save the Date September 23rd for Tree Pittsburgh's Arbor Aid Music & Pawpaw Festival from 11am-9pm at the historic Carrie Furnaces. This family-friendly fundraiser includes live music all day, artists, kids activities, food trucks, local beer, and all things pawpaw. What is pawpaw, you ask? Known as "America's forgotten fruit," pawpaw is a small tree native to the eastern United States which produces a yellowish-green to brown fruit. Having a taste similar to papaya, banana, and mango, the fruit is often foraged and used in everything from sorbet to cookies to beer.