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: Annual
Habit: 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: Green
Bloom 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 , WY
Canada: 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 Plants
FNA: Find Ambrosia trifida var. trifida in the Flora of North America (if available)
Google: Search Google for Ambrosia trifida var. trifida

Metadata

Record Modified: 2022-10-12
Research By: TWC Staff

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