Identify this fruit tree

One of the purposes of this site is to not only inform, but to provoke thought.  One of the ways this is done is to ask a question.  In the question, there lies the information.  Now then, let us begin.

This shrub or tree grows to be about 20 feet tall, but rarely gets over 10 feet tall.  To keep the tree at a reasonable height, it can be trimmed.  The cuttings from the trimmings can be transplanted to sprout new trees.

This tree produces a fruit that is edible, and can be used to make jelly, jam and preserves.  Just a few of these trees can produce a large amount of food.  This might be the reason why these trees were popular with early settlers in the USA.

This video gives a description of the tree and the fruit it produces.

The orange thing in the middle of the screen is the edible fruit. The immature fruit is green and has several on each branch.

This picture is of the immature fruit.  Notice that there are several fruit on the branch.  Once the tree starts producing, it will continue to produces for several weeks.  The fruit ripens at different rates providing a steady supply of food.

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