Ambrosia artemisiifolia L.
Annual Ragweed, Short Ragweed
Asteraceae (Aster Family)
USDA Symbol: AMAR2
Coarse, hairy-stemmed annual with inconspicuous flowers in elongated clusters.
This plant, not Goldenrod, is a cause of hay fever, recognized by all who suffer the discomfiting allergy. Pollination is by wind, as indicated by the drabness of the flowers, which do not attract insects. The best control is to permit perennial plants to crowd this annual out. Since the seeds persist into winter and are numerous and rich in oil, they are relished by songbirds and upland game birds.
From the Image Gallery
Plant CharacteristicsDuration: Annual
Size Notes: Up to about 5 feet tall, often much shorter.
Bloom InformationBloom Color: Green , Brown
Bloom Time: Jun , Jul , Aug
DistributionUSA: 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 , NV , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , UT , VA , VT , WA , WI , WV , WY
Canada: AB , BC , MB , NB , NL , NS , NT , ON , PE , QC , SK
Native Distribution: Throughout North America, except far north.
Native Habitat: Grows profusely in open mixed grass praries and roadsides. Native to North America although they are also found in Eastern Europe.
Growing ConditionsLight Requirement: Sun , Part Shade , Shade
Conditions Comments: Considered an invasive plant. In gardens ragweed can be contained by hoeing or hand-weeding young plants. It propagates mainly by rhizomes but also by seed. Ragweeds unleash copious amounts of pollen into the wind. So those prone to hay fever watch out.
BenefitUse Medicinal: Tea from leaves applied to swellings, taken to stop vomiting and bloody stools
Warning: Plant parts can cause skin irritation if touched.
Conspicuous Flowers: yes
Find Seed or Plants
Find seed sources for this species at the Native Seed Network.
National Wetland Indicator Status
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Lady Bird Johnson Wildflower Center - Austin, TX
Natural Biodiversity - Johnstown, PA
Native Seed Network - Corvallis, OR
Herbarium Specimen(s)NPSOT 0547 Collected Oct 4, 1987 in Bexar County by Harry Cliffe
NPSOT 1115 Collected Oct 12, 1994 in Bexar County by Harry Cliffe
BibliographyBibref 610 - Edible wild plants of the prairie : an ethnobotanical guide (1987) Kindscher, K.
Search More Titles in Bibliography
Web ReferenceWebref 38 - Flora of North America - beta site (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resourcesUSDA: Find Ambrosia artemisiifolia in USDA Plants
FNA: Find Ambrosia artemisiifolia in the Flora of North America (if available)
Google: Search Google for Ambrosia artemisiifolia
MetadataRecord Modified: 2022-11-09
Research By: NPC