Ambrosia artemisiifolia
Annual ragweed, Roman wormwood, Common ragweed Taxonomy
Synonyms: Ambrosia artemisiifolia elatior, Ambrosia artemisiifolia var. paniculata Subspecific taxa: Classification:
Other taxonomic & nomenclature sources: USDA Plants;  ITIS;  The Plant List;  IPNI Images
   
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Species Distribution
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County Map Legend
Absent: Not known from county Medium confidence: Medium or unknown confidence; often old records or unverifiable observations Medium-high confidence: Often observations by expert botanists High confidence: Often vouchered herbarium records Planted / introduced: Native species introduced outside historic range, or only in planted locations within county (e.g., restorations) Historic / extirpated: Only historic records for the species; likely extirpated (Note that this category is not yet functional) North American distribution maps for this species: FLNA;  USDA Plants;  BONAP;  BISON
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Species Status
Status/Listing: No Information Notes: Origin: Native
Species Description
General: Dicot-herb, annual Roots: adventitious, fibrous Shoots: alternate, opposite leaf arrangment; simple leaf type; lobed (pinnately) leaf margin; Pinnate leaf venation; oblong, lanceolate leaf shape Inflorescence: raceme, spike, head Flowers: unisexual, monoecious; 5 merous; incomplete, not sepals; yellow, green; epigynous ovary position Fruit: achene Physiology: autotrophic; C3 C02 fixation Reproduction: sexual
Ecology & Natural History
Habitat: Probably not part of any native community, but rather in weedy situations following human distrurbance; eroded broken ground; roadsides; along railroads. ILPIN Notes: Stems erect, much branched, rough pubescent. One of the most important hayfever plants. Fruits often eaten by wild turkeys. Muenscher, W.C. 1975. Poisonous Plants of the United States. Functional Relationships:
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