Ambrosia chamissonis

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Ambrosia chamissonis.jpg

|genus = Ambrosia

|species = chamissonis

|authority = (Less.) Greene

|synonyms_ref = [http://www.theplantlist.org/tpl1.1/record/gcc-100748 The Plant List Ambrosia chamissonis (Less.) Greene ]

|synonyms =

• Ambrosia bipinnatifida Greene
• Franseria bipinnatifida (Less.) Nutt.
• Franseria chamissonis Less.
• Franseria cuneifolia Nutt.
• Franseria lessingii Meyen & Walp.
• Franseria villosa Rydb.
• Gaertneria bipinnatifida Kuntze
• Gaertneria chamissonis (Less.) Kuntze

| status = G5

| status_system = TNC

| status_ref = {{Cite web|date=2022-06-22 |url= https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.145724|access-date=22 Jun 2022 |website=NatureServe Explorer Ambrosia chamissonis|title = NatureServe Explorer - Ambrosia chamissonis |publisher=NatureServe}}

}}

Ambrosia chamissonis is a species of ragweed known by the common names silver burr ragweed, silver beachweed and (silver) beach bur(r).[http://www.calflora.org/cgi-bin/species_query.cgi?where-taxon=Ambrosia+chamissonis Calflora taxon report, University of California, Ambrosia chamissonis (Less.) E. Greene Silver Beachweed, beach bur ]

It is known from most of the coastline of western North America from Alaska to Baja California, where it is a resident of beaches and other sandy coastal habitats.[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066044 Flora of North America Vol. 21 Page 16 Ambrosia chamissonis (Lessing) Greene, Man. Bot. San Francisco. 188. 1894. ][http://bonap.net/MapGallery/County/Ambrosia%20chamissonis.png Biota of North America Program 2014 county distribution map]