名詞 black birch:

1. common birch of the eastern United States having spicy brown bark yielding a volatile oil and hard dark wood used for furniture
   同義詞：sweet birch, cherry birch, Betula lenta
2. birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark
   同義詞：river birch, red birch, Betula nigra