# Crassula tetragona subsp. tetragona
**Wikidata**: [Q61946308](https://www.wikidata.org/wiki/Q61946308)  
**Source**: https://4ort.xyz/entity/crassula-tetragona-subsp-tetragona


## References

1. Illustrated Handbook of Succulent Plants
2. Taxonomy database of the U.S. National Center for Biotechnology Information
3. Global Biodiversity Information Facility
4. Tropicos
5. GRIN Taxonomy for Plants
6. UMLS 2023
7. Plants of the World Online
8. Red List of South African Plants
9. World Flora Online
10. Open Tree of Life reference taxonomy version 3.2