# Carduus pycnocephalus subsp. pycnocephalus

> subspecies of plant

**Wikidata**: [Q24688164](https://www.wikidata.org/wiki/Q24688164)  
**Source**: https://4ort.xyz/entity/carduus-pycnocephalus-subsp-pycnocephalus


## References

1. Global Biodiversity Information Facility
2. World Register of Marine Species
3. Tropicos
4. Flora of North America
5. African Plant Database
6. BDTFX v7.00
7. TAXREF v9.0
8. TAXREF v10.0
9. TAXREF v11.0
10. TAXREF v12.0
11. TAXREF v13.0
12. TAXREF v14.0
13. TAXREF v15.0
14. TAXREF v16.0
15. Plants of the World Online
16. European Nature Information System
17. World Flora Online
18. Washington Flora Checklist
19. New York Flora Atlas
20. Flora of the Southeastern United States
21. CalPhotos
22. Flora Croatica Database