I live about a half mile from Davie County (but the opposite side of Davie from the Yadkin). I’ve never found an arrowhead.
I’m confident I’ve identified other trees on my property that are mockernuts, but the mockernut trees have larger buds, much thicker husks on the nuts, bark that isn’t at all shaggy like in this photo, and more leaflets per leaf, so that’s why I feel the trees in these photos aren’t mockernuts.
I have wondered if it isn’t some kind of hybrid, but would I find four separate trees in different areas of my property that were all the same hybrid?