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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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Ammannia robusta

Ammannia robusta Heer & Regel

Grand Redstem

Lythraceae (Loosestrife Family)

Synonym(s): Ammannia coccinea ssp. robusta, Ludwigia scabriuscula

USDA Symbol: AMRO3

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

Found only at two sites in Canada, one in southern B.C. and one in southwestern Ontario. Species is common in United States.


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Plant Characteristics

Duration: Annual
Habit: Herb
Fruit Type: Capsule
Size Notes: Up to about 40 inches tall.

Bloom Information

Bloom Color: Pink , Purple
Bloom Time: May , Jun , Jul , Aug , Sep , Oct , Nov


USA: AR , AZ , CA , CO , IA , ID , IL , IN , KS , KY , LA , MI , MN , MO , MT , ND , NE , NJ , NV , OH , OK , OR , SD , TN , TX , UT , WA , WY
Canada: BC , ON
Native Habitat: Fresh Water Aquatic

Growing Conditions

Soil Moisture: Wet

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 30 - Calflora (2018) Calflora
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 Ammannia robusta in USDA Plants
FNA: Find Ammannia robusta in the Flora of North America (if available)
Google: Search Google for Ammannia robusta


Record Modified: 2022-11-02
Research By: TWC Staff

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