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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Ambrosia chamissonis

Ambrosia chamissonis (Less.) Greene

Silver Bur Ragweed

Asteraceae (Aster Family)

Synonym(s): Ambrosia chamissonis var. bipinnatisecta, Franseria chamissonis, Franseria chamissonis ssp. bipinnatisecta, Franseria chamissonis var. bipinnatisecta

USDA Symbol: AMCH4

USDA Native Status: L48 (N), AK (N), CAN (N)


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Plant Characteristics

Duration: Perennial
Habit: Herb , Subshrub , Shrub
Size Notes: Usually up to about 5 feet tall. May grow to 10 feet tall under the right conditions.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White , Yellow , Green
Bloom Time: Apr , May , Jun , Jul , Aug , Sep , Oct , Nov
Bloom Notes: Flowers are inconspicuous and without ray florets.


USA: AK , CA , OR , WA
Canada: BC

Web Reference

Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Ambrosia chamissonis in USDA Plants
FNA: Find Ambrosia chamissonis in the Flora of North America (if available)
Google: Search Google for Ambrosia chamissonis


Record Modified: 2018-12-11
Research By: CBR

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