Annual Ragweed Ambrosia artemisiifolia Linnaeus    Synonyms: Ambrosia artemisiifolia var. elatior, Ambrosia artemisiifolia var. paniculata, Ambrosia elatior, Ambrosia glandulosa, Ambrosia monophylla, Common Ragweed, Hay Fever Weed.
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Asterales   >   Family Asteraceae   >   Genus Ambrosia   

Status:

This common species' wind-dispersed pollen is notorious for producing late summer and fall allergies. Recorded in all 23 Maryland counties and Baltimore City.

Relationships:

Host plant for various beetle species including Ophraella commnuna and Cylindrocopturus quercus.

Host plant for various moth species including Astrotischeria ambrosiaeella (leafminer), Ragweed Borer Moth, Epiblema minutana, and Bidens Borer Moth.

Host plant for various fly species including Calycomyza ambrosiae (leafminer).

There are 514 records in the project database.

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Annual Ragweed blooming in Montgomery Co., Maryland (8/2/2014). Photo by Jim Brighton. (MBP list)

Annual Ragweed, also known as Common Ragweed and Hay Fever Weed, in Prince George's Co., Maryland (8/5/2012). Photo by Bill Hubick. (MBP list)

Annual Ragweed in Kent Co., Maryland (7/5/2016). Photo by Nancy Martin. (MBP list)

Annual Ragweed growing in St. Mary's Co., Maryland (5/10/2016). Photo by Nancy Martin. (MBP list)

Annual Ragweed in Anne Arundel Co., Maryland (9/24/2016). Photo by Bill Harms. (MBP list)

Annual Ragweed growing in Garrett Co., Maryland (8/20/2006). Photo by Boyer and McDowell. (MBP list)

Annual Ragweed in Baltimore Co., Maryland (4/29/2019). (c) Emily L. Stanley, all rights reserved. Photo by Emily Stanley. (MBP list)

Annual Ragweed in Kent Co., Maryland (9/3/2013). Photo by Jim Brighton. (MBP list)


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