Asteraceae
Silver bur ragweed
Ambrosia chamissonis
- Family
- Asteraceae
- Genus
- Ambrosia
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Common names
By language (3)
- Arabic
- دمسيسة شامسوانية
- arz
- دمسيسه شامسوانيه
- English
- Silver bur ragweed
Synonyms
- Ambrosia bipinnatifida (Nutt.) Greene
- Ambrosia chamissonis f. bipinnatisecta (Less.) W.W.Payne
- Ambrosia chamissonis f. chamissonis
- Ambrosia chamissonis var. bipinnatisecta (Less.) J.T.Howell
- Ambrosia chamissonis var. chamissonis
- Ambrosia chamissonis var. cuneifolia (Nutt.) W.W.Payne
- Franseria bipinnatifida var. bipinnatifida
- Franseria bipinnatifida var. insularis Reiche
- Franseria chamissonis Less.
- Franseria chamissonis f. bipinnatisecta (Less.) Calder & Roy L.Taylor
- Franseria chamissonis f. chamissonis
- Franseria chamissonis subsp. bipinnatisecta (Less.) Wiggins & Stockw.
- Franseria chamissonis subsp. chamissonis
- Franseria chamissonis subsp. typica Wiggins & Stockw.
- Franseria chamissonis var. bipinnatisecta Less.
- Franseria chamissonis var. chamissonis
- Franseria chamissonis var. cuneifolia (Nutt.) Torr. & A.Gray
- Franseria cuneifolia Nutt.
- Franseria lessingii Meyen & Walp.
- Franseria villosa Rydb.
- Gaertneria bipinnatifida (Nutt.) Kuntze
- Gaertneria bipinnatifida var. bipinnatifida
- Gaertneria bipinnatifida var. dubia (Eastw.) A.Heller
- Gaertneria chamissonis (Less.) Kuntze
- Gaertneria chamissonis var. chamissonis
- Gaertneria chamissonis var. viscida (Eastw.) A.Heller
Flowers
- In flower
- June to September (from 340 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Forb/herb, Shrub, Subshrub
- Lifespan
- Perennial
- In the US and Canada
- Alaska: native, Canada: native, Lower 48 states: native
Photos
FlowerPhoto: Amanda Fisher, CC BY 4.0, from iNaturalist 
FlowerPhoto: Melanie Link-Perez, CC BY 4.0, from iNaturalist 
FlowerPhoto: Jordi Moreno-Romero, CC BY 4.0, from iNaturalist 
FlowerPhoto: mel letterman, CC BY 4.0, from iNaturalist 
Photo: moorebuesing, CC0, from iNaturalist 
Photo: Eric in SF, CC BY-SA 3.0, from Wikimedia Commons 
Photo: zookanthos, CC BY 4.0, from iNaturalist 
Photo: Franco Folini from San Francisco, USA, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Dan Horowitz, CC0, from iNaturalist 
Photo: Dick Culbert from Gibsons, B.C., Canada, CC BY 2.0, from Wikimedia Commons 
Photo: Keenan Pepper, CC BY 4.0, from iNaturalist 
Photo: Jim Morefield from Nevada, USA, CC BY-SA 2.0, from Wikimedia Commons
More in Ambrosia
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- Great ragweedAmbrosia trifidaAsteraceae
- Peruvian ragweedAmbrosia peruvianaAsteraceae
- BurrobushAmbrosia dumosaAsteraceae
- Flatspine bur ragweedAmbrosia acanthicarpaAsteraceae
- Ambrosia-leaf bursageAmbrosia ambrosioidesAsteraceae
- Weakleaf bur ragweedAmbrosia confertifloraAsteraceae
- Ambrosia arborescensAsteraceae
- Tucson bur ragweedAmbrosia cordifoliaAsteraceae
- Triangle bur ragweedAmbrosia deltoideaAsteraceae
- Dwarf bur ragweedAmbrosia pumilaAsteraceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.