Seeds from rubertrees picked on a walk on Marajó in Pará, Brazil in january 2007 and placed on a summertable in Tullinge.
When the seeds are ejected from the capsels you hear a sound like a pistolshot. Henry Wickham took 70 000 of them to Kew garden in London in 1876. They grow and where exported to south-east Asia and led to the fall of Barzilian rubber-industry in the 1930th.
Read more about it in Steven Alexanders book Santarém Riverboat Town. You can read more about his book in his blog http://bosque-santa.blogspot.com/ .