saw this on the dicovery channel..thought it was interesting,so I looked it up,the rarest tree,a living fossil:
http://www.wollemipine.com/
http://www.rbgsyd.gov.au/information_about_plants/wollemi_pine
http://images.google.com/images?num=100&hl=en&safe=off&q=wollemi%20pine&spell=1&sa=N&tab=wi

when 1st discovered,they were fenced & locked in,fearing tree poachers.
thought to be priceless.
now,it is thought the best way to protect them,was to breed them & sell them to promote there spread.
arboretums & botanical gardens can even order them now:
http://www.wollemipine.com/order.php