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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 hispida

Ambrosia hispida Pursh

Coastal Ragweed, Beach Ragweed, Bay Geranium

Asteraceae (Aster Family)


USDA Symbol: AMHI3

USDA Native Status: L48 (N), PR (N), VI (N)


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Plant Characteristics

Duration: Perennial
Habit: Herb , Subshrub
Leaf Arrangement: Opposite
Leaf Shape: Deltoid , Elliptic , Ovate
Size Notes: Up to about 1 foot tall. Prostrate or decumbent stems up to about 2-1/2 feet long.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: Yellow
Bloom Time: Apr
Bloom Notes: Spikes of downward-facing inconspicuous flowers.



Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

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


Record Modified: 2023-03-02
Research By: DEW

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