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Plant Profile  
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Common Name: Lanceleaf Ragweed

Other Names: Southern Ragweed

Species Name: Ambrosia bidentata

Plant Type: Forb

Family Name: Asteraceae, Sunflower Family





Plant Facts  
Origin Native
Duration Annual
Distribution in the U.S. Midwest; from Ohio and Kentucky to Nebraska, Texas and Louisiana
Distribution in Oklahoma Eastern one-third of the state



ID Characteristics

  • Field Identification Characteristics


    • Foliage covered in hairs
    • Wide, open branches
    • Leaves directly attached to branches
    • Leaves 3-pointed; middle point much longer than the other two


    • Flowers small, green clusters in columns of branch tips
  • Leaf and Stem Characteristics
    • Leaf Type: Simple
    • Leaf Arrangement: Alternate
    • Leaf Shape: Lobed; middle lobe considerably longer than 2 side lobes
    • Stipules: Absent
  • Floral Characteristics
    • Petal Number: 4-7 (male); 1 (female)
    • Flower Color: Green (inconspicuous)
    • Flower Timing: July-October
    • Fruit Type: Achene



Soil Type Various moist soils
Habitat Borrow ditches and overgrazed prairie; highly disturbed areas
Successional Stage Early


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