betula nigra 12 Associations

black birch river birch red birch Betula nigra birch (generic term) birch tree (generic term)

black birch 11 Associations

river birch red birch Betula nigra birch (generic term) birch tree (generic term)

red birch 9 Associations

black birch river birch Betula nigra birch (generic term) birch tree (generic term)

river birch 11 Associations

black birch red birch Betula nigra birch (generic term) birch tree (generic term)