# Sempervivum marmoreum subsp. ballsii
**Wikidata**: [Q64728892](https://www.wikidata.org/wiki/Q64728892)  
**Source**: https://4ort.xyz/entity/sempervivum-marmoreum-subsp-ballsii


## References

1. Illustrated Handbook of Succulent Plants
2. Global Biodiversity Information Facility
3. International Plant Names Index
4. Plants of the World Online
5. World Flora Online