No botanist, I must rely on what I know about Holly, and my great interest in plants and as a High School Biology teacher. All, Ilex, or Holly are, individually, Male or Female. And your names indicate Dragon Lady a berry bearing female and your Blue Prince never able to bear berries or produce young. It does give the sperm, via pollen, carried by small flying insects, to the Dragon Lady, and the offspring will have diverse characteristics or both plants Some babies will look more like the male or the female.

Thank you bogturtle. Your answer is exactly what I wanted to know (i.e. suspected but was hoping was not true). I don't like to destroy a plant's good effort, but I will pull up the errant Blue Princes and save only the one tiny tree that looks most like my delicate Dragon Lady.

And thank you for your continuing work as a biology teacher, taking over in my education where poor, beleagured Mr. Steele left off.