The kumquat is a citrus fruit that kind of looks like an orange but is oval-shaped and much smaller (1-2 inches). People first grew kumquat trees, also known as fortunella, in China in the 1700s.
The name “kumquat” combines the Chinese words “gam,” meaning gold, and “gwat,” another word for tangerines. The tree came to Europe and the United States in the 1800s. It grows best in warmer areas but can stand up to the cold.