Does your tree have leaves with 15 to 23 leaflets or 11 to 17 leaflets?
Leaves with 15 to 23 leaflets
Leaves with 15 to 23 leaflets; a round nut; the terminal leaflet is usually absent; bark is dark brown to nearby black; pith of twigs is tan in color
OR
Leaves with 11 to 17 leaflets
Leaves with 11 to 17 leaflets; an oval nut; the terminal bud is present; bark is light gray; pith of twigs is dark chocolate brown