Mamosa tree
a walnut tree.
an apple tree
sweet gum trees produce gumballs
blackberries
THe water lily, blackberry, the burdock, birch tree, lotus and apple tree.
Neim tree
The cassia tree produces senna and other valuable products.
Blackberries don't grow on trees, so no.
With plants, it means to grow a different plant on a root. By making some cuts of the right kind you can graft an orange branch onto a lemon tree, so that one part of the tree produces lemons and another part produces oranges.
Pecan tree
Pine tree. It produces cones.