Ragweeds

Part of speech: noun

Definitions

1. A type of flowering plant belonging to the genus Ambrosia, known for its ability to produce pollen that can trigger allergic reactions in many individuals
2. Broadleaf plants of the Asteraceae family, often found in North America, that are notorious for their role in hay fever and asthma due to their highly allergenic pollen
3. Herbaceous plants commonly associated with disturbed lands, recognized for their coarse leaves and composite flowers which can contribute to seasonal allergies in humans

Etymology: Ragweeds are a plural form, so the story is really that of "ragweed" itself. The name is a blend of two older words. "Ragwort" was an earlier name for a different group of yellow-flowered plants, and "ragweed" emerged as an alteration of it. The first half, "rag," most likely points to the tattered, ragged look of the plant's leaves, while "weed" comes from Old English "wēod," a general word for a useful or unwanted plant that later narrowed to mean any unwanted one. The name is also borrowed into a different plant with a different appearance. The older "ragwort" was applied to plants in the daisy family, and the modern ragweeds, which are also in that family, took the name over. Their connection to hay fever is a much later discovery, and the name had already been in use for centuries before anyone linked the plants to the sneezing season.