Ambrosia artemisiifolia
Học thuậtThân thiện
Definition
Noun: * Common Ragweed: A species of annual flowering plant in the aster family, characterized by its finely divided, fern-like foliage and spikes of small, greenish flowers. It is native to North America but has been accidentally introduced to other regions. It is a widespread weed and a major source of allergenic pollen.
Usage Examples
- Noun:
- The field was overrun with Ambrosia artemisiifolia, causing severe hay fever symptoms in the local population.
- Botanists study the spread of Ambrosia artemisiifolia as an invasive species in Europe.
- Identifying Ambrosia artemisiifolia is important for farmers trying to control it.
Advanced Usage
- Scientific Context: The name is used formally in botanical, ecological, and medical literature to precisely identify the species, distinguishing it from other ragweeds (e.g., , giant ragweed).
- The study focused on the pollen production of Ambrosia artemisiifolia compared to other allergenic plants.
Variants and Related Words
- Common Ragweed (n): The standard common name for .
- Ragweed (n): The general term for plants in the genus , which includes .
- Annual Ragweed (n): Another common name, highlighting its life cycle.
- Hay-fever Weed (n): A colloquial name referencing its primary impact on human health.
Synonyms
- Common Ragweed
- Annual Ragweed
- (Botanical) (an older synonym)
Notes on Meaning
- Botanical/Formal Meaning: Refers specifically to this plant species within the scientific system of classification (binomial nomenclature).
- Ecological/Medical Meaning: Denotes a prolific weed and a significant source of seasonal allergens (pollen). Its presence is often discussed in contexts of public health, agriculture, and invasion biology.
Noun
- annual weed with finely divided foliage and spikes of green flowers; common in North America; introduced elsewhere accidentally