# Crataegus nigra

> species of plant

**Wikidata**: [Q745228](https://www.wikidata.org/wiki/Q745228)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Crataegus_nigra)  
**Source**: https://4ort.xyz/entity/crataegus-nigra


## References

1. The IUCN Red List of Threatened Species 2022.2
2. IUCN Red List
3. Taxonomy database of the U.S. National Center for Biotechnology Information
4. Integrated Taxonomic Information System
5. Encyclopedia of Life
6. Global Biodiversity Information Facility
7. Tropicos
8. The Plant List 1.1
9. GRIN Taxonomy for Plants
10. United States Department of Agriculture Plants Database
11. A dataset on catalogue of alien plants in China
12. UMLS 2023
13. National Biodiversity Network
14. Plants of the World Online
15. European Nature Information System
16. eBiodiversity
17. World Flora Online
18. Open Tree of Life reference taxonomy version 3.2
19. FloraVeg.EU
20. Flora Croatica Database