Tea tree
Thistle, Bull nettle (like macadamia)
Truffles
Well, I do declare, I never saw truffles on a tree or vine - what weird plants you have in the New World.
ugli fruit
Vaccinium consanguineum--Costa Rican blueberry
whortleberries - they grow on Dartmoor, ankle-high, and I haven't seen them elsewhere. Us calls they 'worts'.
Xylopia aromatica - monkey pepper
Ziziphus jujuba - Chinese Dates
http://hort.ifas.ufl.edu/trees/ZIZJUJA.pdf
Well known, or not, rivers of the World...................
Amazon.
