Ragweed

Ragweeds are flowering plants in the genus Ambrosia in the family Asteraceae. The most widespread species of the flower in North America is Ambrosia artemisiifolia.There are over 40 species. Most of them occur in the southwestern United States and northwestern Mexico.^[2] Several species have been introduced to the Old World. Some have naturalized and have become invasive species.^[3] Ragweed species are expected to continue spreading across Europe in the near future because of climate change.^[4]

Ragweed
Ambrosia psilostachya
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Subfamily:	Asteroideae
Tribe:	Heliantheae
Subtribe:	Ambrosiinae
Genus:	Ambrosia L.
Synonyms[1]
Acanthambrosia Rydb. Franseria Cav. Hymenoclea Torr. & A.Gray ex Torr. & A.Gray Xanthidium Delpino Gaertneria Medik. Hemiambrosia Delpino Hemixanthidium Delpino

References

1. "Global Compositae Checklist". Archived from the original on 9 March 2015. Retrieved 6 March 2015.
2. León de la Luz, José Luis; Rebman, Jon P. (June 2010). "A new Ambrosia (Asteraceae) from the Baja California Peninsula, Mexico". Boletín de la Sociedad Botánica de México. 86 (6): 65–70.
3. Ambrosia. Flora of North America.
4. Rasmussen, Karen; Thyrring, Jakob; Muscarella, Robert; Borchsenius, Finn (16 March 2017). "Climate-change-induced range shifts of three allergenic ragweeds (Ambrosia L.) in Europe and their potential impact on human health". PeerJ. 5: e3104. doi:10.7717/peerj.3104. PMC 5357339. PMID 28321366.