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Common Ragweed

Ambrosia artemisiifolia L.

Asteraceae (Sunflower Family)

▲ ▼ seedlings

,

▲▼young plants with varying degrees of lobing on leaves

▲▼young plants with varying degrees of lobing on leaves

▲▼young plants

 

▲ ▼ immature plants

▲ ▼ immature plants

▲▼ mature plants

▲ inflorescences

▲ close-up of pollen in male flowers

Ambrosia artemisiifolia L., Common Ragweed: (Bayer Code:  AMBEL; US Code AMAR2)

         Is a much-branched summer annual weed with finely divided (fernlike leaves) (2-4' tall), shorter in poorer growing conditions

         Small, spike-like inflorescence at tips of branches, abundant wind-borne pollen

         Often a first-year invader weed to newly abandoned fields

         Fast-growing, aggressive competitor in agronomic, vegetable crops

         good source of food and cover for wild birds (quail)

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Updated 19 January 2019