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NPIN: Native Plant Database

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Amaranthus spinosus (Spiny amaranth)
Martin, Edwin M.

Amaranthus spinosus

Amaranthus spinosus L.

Spiny amaranth, Thorny pigweed

Amaranthaceae (Amaranth Family)

Synonym(s):

USDA Symbol: AMSP

USDA Native Status: L48 (N), HI (I), PR (N), VI (N), CAN (I)

Tiny, yellow-green flowers on a stout, much-branched, sometimes reddish stem. Amaranthus species, though regarded as common weeds, produce tremendous numbers of seed-like fruit, which are an important food for many songbirds.

The Amaranthaceae are a family of annual or perennial herbs with small, crowded flowers. There are usually 5 sepals and no petals. Filaments of the stamens are often united into a short tube.

 

Plant Characteristics

Duration: Annual
Habit: Herb
Flower:
Fruit:
Size Class: 3-6 ft.

Bloom Information

Bloom Time: Jul , Aug , Sep , Oct

Distribution

USA: AL , AR , CA , CT , DC , DE , FL , GA , HI , IA , IL , IN , KS , KY , LA , MA , MD , ME , MN , MO , MS , NC , NE , NJ , NY , OH , OK , PA , RI , SC , TN , TX , VA , VT , WI , WV
Native Distribution: Manitoba and Ontario; Maine south to Florida, west to Texas, and north to Minnesota.
Native Habitat: Waste places, disturbed ground, and cultivated soil.

National Wetland Indicator Status

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: FACU FACU FACU FACU FACU FACU FACU FACU
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.

Herbarium Specimen(s)

NPSOT 0731 Collected Sep 13, 1992 in Bexar County by Harry Cliffe

1 specimen(s) available in the Digital Herbarium

Additional resources

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

Metadata

Record Modified: 2008-12-17
Research By: TWC Staff

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