What is the X in X-mas?
monoecious mo·noe·cious or mo·ne·cious (mə-nē'shəs)
Having unisexual reproductive organs or flowers, with the organs or flowers of both sexes carried on a single plant, as in corn.
Having separate male flowers and female flowers on the same plant. Maize and oaks are monoecious plants. Compare dioecious.