How many vegetables grow on trees?
Since fruit is the organ that contains the seeds of the plant or
tree on which is grows, anything that grows on trees will be fruit.
Only something like the leaves or bark of a tree would be
considered a vegetable if it were harvested and used in foods.
There are some barks and leaves that are used, but all of those are
spices or used in drinks like tea. So I don't believe any
vegetables grow on trees.