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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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Amaranthus cannabinus

Amaranthus cannabinus (L.) Sauer

Salt-marsh Water-hemp, Tidal-marsh Water-hemp, Tidalmarsh Amaranth, Water-hemp Pigweed

Amaranthaceae (Amaranth family)

Synonym(s): Acnida cannabina

USDA Symbol: AMCA2

USDA Native Status: L48 (N)


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Plant Characteristics

Duration: Perennial
Habit: Herb
Size Notes: Up to about 10 feet tall.
Fruit: Utricle. Seeds reddish brown to dark brown, shiny.

Bloom Information

Bloom Color: White , Green
Bloom Time: Jun , Jul , Aug , Sep , Oct , Nov


USA: AL , CT , DC , DE , FL , GA , LA , MA , MD , ME , NC , NH , NJ , NY , PA , RI , SC , VA
Native Habitat: Coastal salt or brackish marshes, edges of sloughs, tidal riverbanks, tidal flats; rarely freshwater semiaquatic habitats.

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 3 - Flora of North America (2014) 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 Amaranthus cannabinus in USDA Plants
FNA: Find Amaranthus cannabinus in the Flora of North America (if available)
Google: Search Google for Amaranthus cannabinus


Record Modified: 2020-10-27
Research By: CBR

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