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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Ambrosia artemisiifolia var. artemisiifolia

Ambrosia artemisiifolia L. var. artemisiifolia

Annual Ragweed

Asteraceae (Aster Family)

Synonym(s):

USDA Symbol: AMARA2

USDA Native Status: L48 (N), CAN (N)

This plant is a cause of hay fever, recognized by all who suffer the discomfiting allergy. (Niering)

 

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Plant Characteristics

Duration: Annual
Habit: Herb
Leaf Arrangement: Alternate , Opposite
Leaf Complexity: Simple
Leaf Shape: Elliptic , Lanceolate , Ovate
Leaf Pubescence: Glandular
Leaf Base: Cuneate
Size Notes: Up to about 5 feet tall, often much shorter.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: Yellow , Green , Brown
Bloom Time: Jul , Aug , Sep , Oct

Distribution

USA: CT , DC , GA , IL , MA , MD , ME , MN , MO , MS , NH , NY , PA , TN , VA , VT
Canada: NB , NL , NS , ON , PE , QC
Native Habitat: Forest Edge,Prairie/Meadow/Field

Benefit

Conspicuous Flowers: yes

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Ambrosia artemisiifolia var. artemisiifolia in USDA Plants
FNA: Find Ambrosia artemisiifolia var. artemisiifolia in the Flora of North America (if available)
Google: Search Google for Ambrosia artemisiifolia var. artemisiifolia

Metadata

Record Modified: 2022-11-09
Research By: TWC Staff

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