jack oak
n 1: a common scrubby deciduous tree of central and southeastern
United States having dark bark and broad 3-lobed
(club-shaped) leaves; tends to form dense thickets [syn:
blackjack oak, blackjack, Quercus marilandica]
2: small to medium deciduous oak of east central North America;
leaves have sharply pointed lobes [syn: northern pin oak,
Quercus ellipsoidalis]