In honour of tree week... the world's rarest tree

There is an interesting thread and discussion on the world's rarest tree here-

http://forums2.gardenweb.com/forums/load/trees/msg0115503821754.html

People often think the rarest tree is Australia's Wollemi Pine: a tree which was actually long thought extinct, until a National Parks Officer stumbled upon a secluded gorge with Wollemi Pines near Sydney. However, thanks to a propagation programme, Wollemi Pines are no longer quite so rare. London's Kew Gardens even has one on public display- their website gives more information on the Wollemi pine and pictures here-

http://www.kew.org/plants/wollemipine.html