# Betula pendula var. obscura
**Wikidata**: [Q92994621](https://www.wikidata.org/wiki/Q92994621)  
**Source**: https://4ort.xyz/entity/betula-pendula-var-obscura


## References

1. Global Biodiversity Information Facility
2. International Plant Names Index
3. World Checklist of Selected Plant Families
4. World Flora Online