More than likely, you had to make your family tree for a classroom project. You probably had branches containing your parents, grandparents, great grandparents, and maybe even relatives from earlier generations.
The family tree of a certain plant group is what the science of plant systematics tries to elucidate. You may know or at least have heard of your ancestors; plants can't communicate as to who their ancestors are, except for through their genetics or through their morphology.
Find out more about how plants make their own family trees.
Photo: Keith Weller, USDA-ARS.