Western Ragweed

ambrosia psilostachya

Western Ragweed (Ambrosia psilostachya) is a ubiquitous and often abundant herbaceous perennial plant native to much of North America. Renowned for its robust growth and remarkable ability to rapidly colonize disturbed areas, it plays a critical ecological role in early successional stages, frequently being one of the pioneering species to establish itself in open, degraded soils. Its deep and spreading rhizomatous root system allows it to persist and thrive in challenging environments. While providing essential ground cover and contributing to soil stabilization in certain ecosystems, it is perhaps most infamous for its highly allergenic pollen. This characteristic makes it a primary culprit for seasonal hay fever (allergic rhinitis) for millions of people across the continent. Despite its notoriety as an agricultural weed and an allergen, Ambrosia psilostachya exhibits impressive resilience and adaptability, capable of flourishing in a diverse range of environmental conditions.

生息地: Western Ragweed is typically found in disturbed habitats such as roadsides, agricultural fields, pastures, waste areas, prairies, and open woodlands, preferring dry to moist, well-drained soils.

外見

This plant typically grows 30-100 cm tall, forming dense patches. Its stems are erect, hairy, and usually branched, often reddish or purplish at the base. The leaves are deeply lobed or dissected, giving them a finely cut appearance, and are grayish-green, feeling rough to the touch due to stiff hairs. Both sides of the leaves may have a slightly silvery sheen. The flowers are inconspicuous, borne in green-yellow spikes (racemes) at the tips of stems and in leaf axils during late summer and early fall. Male flowers are clustered above female flowers, which are found in the leaf axils below.

界Plantae門Tracheophyta綱Magnoliopsida目Asterales科Asteraceae属Ambrosia

Western Ragweed

カテゴリ

植物

レア度

Common

危険度

1/5 · 非常に低い

スナップ

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おもしろい事実

Despite its bad reputation for allergies, the seeds of ragweed plants are an important food source for many bird species, especially during winter months.

It's a resilient plant, capable of germinating and growing vigorously even in soils with low nutrient content, helping to stabilize disturbed ground.

The pollen of Western Ragweed is one of the most significant sources of autumn hay fever (allergic rhinitis) in North America, affecting millions of people.

Western Ragweed can be an indicator of disturbed or overgrazed land, as it thrives in areas where other more sensitive plants struggle.

特殊能力

Produces vast quantities of lightweight, wind-borne pollen, making it a highly effective disperser but also a significant allergen.

Possesses an extensive underground rhizome system, allowing it to rapidly colonize new areas and form dense clonal patches, outcompeting other vegetation.

Highly adapted to dry and arid conditions, enabling it to thrive in nutrient-poor or stressed environments where other plants might struggle.

サイズと詳細

長さ: 30-100 cm
体重: 0.1-0.5 kg
寿命: 1-5 年

食性と食事

As a photosynthetic organism, Western Ragweed produces its own food by converting sunlight into energy. It absorbs water and essential mineral nutrients from the soil.

主な食物

Sunlight
Carbon Dioxide
Water
Nitrogen
Phosphorus
Potassium

採餌方法

Absorption And Photosynthesis

生態系とのつながり

eaten by

American Goldfinch

Spinus tristis

Seeds provide food for granivorous birds.

host plant

Common Buckeye Butterfly

Junonia coenia

Host plant for caterpillars.

eaten by

Ragweed Leaf Beetle

Zygogramma suturalis

Herbivore that feeds on foliage.

competitor

Big Bluestem

Andropogon gerardii

Competes with native grasses and forbs for resources.

特徴

このオブジェクトにはまだ特徴バッジが割り当てられていません。

別名

まだ別名はありません。

コレクション

テーマが追加されると、このオブジェクトのコレクションがここに表示されます。

安全性

危険度

1/5 · 非常に低い

まだ特別な安全上の注意はありません。

よくある質問

Western Ragweedを見分けるには？

Western Ragweedを識別する最も簡単な方法は、Snappit自然識別アプリを使用することです。

Western Ragweedの長さは何ですか？

30-100 cm

Western Ragweedの体重は何ですか？

0.1-0.5 kg

Western Ragweedの寿命は何ですか？

1-5 年

Western Ragweedは何を食べますか？

As a photosynthetic organism, Western Ragweed produces its own food by converting sunlight into energy. It absorbs water and essential mineral nutrients from the soil.

Western Ragweedは通常どこに生息していますか？

Western Ragweed is typically found in disturbed habitats such as roadsides, agricultural fields, pastures, waste areas, prairies, and open woodlands, preferring dry to moist, well-drained soils.

Western Ragweedはどのように狩りをしますか？

Absorption And Photosynthesis