Birch bark or birchbark is generally understood to be the bark of the Paper Birch tree -LRB- PERSON@1 papyrifera -RRB- , or sometimes of related species such as Gray -LRB- Wire -RRB- Birch -LRB- PERSON@1 populifolia -RRB- .

Birch bark or birchbark is usually the bark of the Paper Birch tree or sometimes of similar trees such as Gray -LRB- Wire -RRB- Birch .
