This young tree (there are more) was found in a beech forest, growing in partial shade. It readily fits within F.ornus descriptions except the buds, which are black in color. Could this be some sort of variation within the species? Or maybe it is F.excelsior? This is confusing because I'm used to see F.excelsior leaves long acuminate, not with cuspidate tips as in the photos provided. Any tips appreciated!