The Blue Mountains are home to an astonishingly diverse array of flora and fauna. There are 152 plant families and 484 genera in the area. The area lists 92 eucalypt tree species found and 127 rare or threatened plant species found in the area. In addition, the area contains 132 vascular plants that are found nowhere else on Earth, as typified by the living fossil, the Wollemi Pine, whose history dates back 100 million years.