Quick definitions from WordNet (black birch)
▸ noun: birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark
▸ noun: common birch of the eastern United States having spicy brown bark yielding a volatile oil and hard dark wood used for furniture
▸ noun: birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark
▸ noun: common birch of the eastern United States having spicy brown bark yielding a volatile oil and hard dark wood used for furniture