Native Plants
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Ambrosia trifida var. trifida
Ambrosia trifida L. var. trifida
Great Ragweed
Asteraceae (Aster Family)
Synonym(s): Ambrosia trifida var. integrifolia
USDA Symbol: AMTRT2
USDA Native Status: L48 (N), CAN (N)
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Plant Characteristics
Duration: AnnualHabit: Subshrub
Leaf Arrangement: Opposite
Leaf Shape: Deltoid , Elliptic , Ovate
Leaf Base: Cuneate , Truncate
Size Notes: Up to about 12 feet tall, often shorter.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: GreenBloom Time: Aug , Sep
Distribution
USA: AL , AR , AZ , CA , CO , CT , DC , DE , FL , GA , IA , ID , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , MT , NC , ND , NE , NH , NJ , NM , NY , OH , OR , PA , RI , SC , SD , TN , TX , UT , VA , VT , WA , WI , WV , WYCanada: AB , BC , MB , NB , NS , ON , PE , QC , SK
Web Reference
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Additional resources
USDA: Find Ambrosia trifida var. trifida in USDA PlantsFNA: Find Ambrosia trifida var. trifida in the Flora of North America (if available)
Google: Search Google for Ambrosia trifida var. trifida
Metadata
Record Modified: 2022-10-12Research By: TWC Staff