Common Name: ragweed, common
Species: Ambrosia artemisiifolia L.
Bayer Code: AMBEL

Common ragweed is a summer annual weed that emerges early in the spring. It is often found in cultivated areas, but also occurs in roadsides and landscapes. It prefers heavy soils as opposed to sandy soils, and does not tolerate heavy mowing. The deeply dissected leaves are arranged oppositely when young, and alternately in older parts of the plant. Leaves are hairy on both surfaces. Ragweed produces copious amounts of pollen in the late summer, and often causes allergy problems.
common ragweed
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common ragweed
common ragweed
common ragweed leaves
common ragweed
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CharacteristicTypeDescription
Growth Season summer annual weed 
Growth Habit upright 
Leaflet Number one 
Leaf Margin lobed 
Leaf Hairs upper/lower surface 
Leaf/Leaflet Shape oval/egg-shaped/elliptical 
Leaf Width 1 - 2 inches OR greater than 2 inches 
Leaf Venation pinnate 
Leaf Arrangement  leaves are arranged oppositely when young, and alternately in older parts of the plant
Root Type taproottaproot with many root hairs
Flower Color  inconspicuous