common ragweed

Thân thiện

A field of common ragweed grows along the roadside.

Definition

Noun: A North American annual plant (Ambrosia artemisiifolia) with finely divided, fern-like leaves and spikes of small green flowers. It is a widespread weed, often causing significant seasonal allergies due to its abundant wind-dispersed pollen.

Examples of Usage

• The fields were overrun with common ragweed, triggering hay fever symptoms in many people.
• Botanists study the spread of common ragweed as an invasive species in Europe.
• Identifying common ragweed is important for farmers trying to control it.

Advanced Usage

• As a subject of study: The plant is frequently discussed in contexts of ecology, allergy medicine, and invasive species biology.
  • The research focused on the allergenic properties of common ragweed pollen.
• In a compound noun form: While "common ragweed" itself is the target term, it can be part of larger noun phrases.
  • The common ragweed population has increased due to climate change.

Variants and Related Words

• Ragweed (n): The general name for plants in the genus . "Common ragweed" is a specific species.
• Ambrosia artemisiifolia (n): The scientific (Latin) name for common ragweed.
• Annual ragweed (n): Another common name, emphasizing its life cycle of germinating, flowering, and dying in one year.

Synonyms

• Bitterweed: A regional name sometimes used for ragweed.
• Hay-fever weed: A descriptive name highlighting its primary impact on humans.

Notes on Different Meanings

The term "common ragweed" has a single, specific botanical meaning. It does not have multiple distinct definitions like many common words. Its significance lies in its identity as a particular plant species with notable ecological and health impacts.

Học thuật

Noun

1. annual weed with finely divided foliage and spikes of green flowers; common in North America; introduced elsewhere accidentally

Từ đồng nghĩa

• ambrosia artemisiifolia