black oak

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Either of two deciduous oaks trees, Quercus velutina of eastern North America or Q. kelloggii of California and Oregon, having glossy lobed leaves with sharp tips, blackish bark, and durable wood.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun medium to large deciduous timber tree of the eastern United States and southeastern Canada having dark outer bark and yellow inner bark used for tanning; broad five-lobed leaves are bristle-tipped