# Helenium amarum var. amarum

> variety of plants

**Wikidata**: [Q24690919](https://www.wikidata.org/wiki/Q24690919)  
**Source**: https://4ort.xyz/entity/helenium-amarum-var-amarum


## References

1. Taxonomy database of the U.S. National Center for Biotechnology Information
2. Integrated Taxonomic Information System
3. Global Biodiversity Information Facility
4. World Register of Marine Species
5. Tropicos
6. GRIN Taxonomy for Plants
7. Flora of North America
8. United States Department of Agriculture Plants Database
9. UMLS 2023
10. Plants of the World Online
11. Australian Plant Name Index
12. Native Plants Database
13. New York Flora Atlas
14. Maryland Plant Atlas
15. Indiana Plant Atlas
16. CalPhotos