Commented: Native black maple in VA??"...and most maples prefer acidic soil..."
Not these. I have some research plots in the Apps and have seen black maples in quite acidic soils (and sugar maples too). Back home in upstate NY...
Commented: sumac male or femaleThe other plants next to it have the same growth habit; I'm guessing they are shaded. See that brilliant fleck of color in the branches? Premature senescence, and an aspect shared by many sumacs.