Rubber tree
The rubber tree (Hevea brasiliensis) was a woody plant native to Earth, so named because it produced a substance that could be made into natural rubber.

In one of the stories in The Adventures of Flotter children's holonovel series, Flotter suspected Trevis was a rubber tree, so he kept trying to trip him to see if he would bounce. ()

See also
 Rubber Tree People

External link 
 

de:Gummibaum
Earth plants