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Ambrosia
Ragweed (Ambrosia) is a genus of annual and perennial herbs and shrubs in the daisy family, mostly native to the Americas. Its pollen is a major cause of hay fever, and some species are invasive weeds rather than garden plants.
Ragweeds are flowering plants in the genus Ambrosia in the aster family, Asteraceae. They are distributed in the tropical and subtropical regions of the Americas, especially North America, where the origin and center of diversity of the genus are in the southwestern United States and northwestern Mexico. Several species have been introduced to the Old World and some have naturalized and have become invasive species. In Europe, this spread is expected to continue, due to ongoing climate change.
The name "ragweed" is derived from "ragged" + "weed," coming from the ragged appearance of the plant's leaves. Other common names include bursages and burrobrushes. The genus name is from the Greek ambrosia, meaning "food or drink of immortality".
Ambrosia arborescens · Annual ragweed · Coastal ragweed · Skeletonleaf bur ragweed · Great Ragweed
Text excerpted from the Wikipedia article Ragweed by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
