Hickories

..... bitternut

hairy twigs & buds with paire and mostly yellow scales: fr winged

 shagbarks

large ends buds more than 1/2" long and with scales overlapping; twigs & nut husks both more than 1/8" thick; end leaf biggger; buds silvery

 pignuts

end buds less than 1/2" long with scales overlapping, slender twigs, and thin nut husks
leaflets/bark:

5-7; close

 ..... ..... pignut (9.glabra = smooth) upland woods; s VT to FL buds glabrous except for resin dots; end buds silky
5-7; shaggy ..... shagbark (7.ovata = ovate, the fruit) lvs not hairy; twigs more or less hairy; rich, moist soil; s ME to GA .....
7-9; close ..... mockernut (5.tomentosa = tomentose) lvs soft hairy; twigs hairy; bk becomes deeply furrowed; dry woods; MA to FL ......
7-9; shaggy ..... shellbark (4.lacinosa = w flaps, the bark) lvs soft hairy; twigs more or less hiary; twigs pale orange; flood plains; NY to GA .....
5-11; shaggy mostly bitternut (2.cordiformis = heart-shaped, the nut) narrow ellip lflts; woods; sME to Fl; buds sulphur-yellow ..... .....