45. Wollemia nobilis
The Wollemi pine is native to Australia and was thought to be extinct until 1994 when it was discovered to be growing in New South Wales. There is less than 100 adult plants growing in the wild. They were made available to Botanic gardens from 2006. Lowest recorded temperatures tolerated are known to be -12 C. It is not a true pine or a member of the pine family. The oldest fossil of the Wollemi tree is dated to 200 million years ago. It can reach 40 metres (130 feet) tall. This specimen is 2 metres (6 feet) tall and was planted in 2010 to recognise Sir William Gibson-Craig's contribution to Edinburgh plant collection.