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Amaranthus retroflexus Linnaeus. Rough Pigweed, Redroot, Redroot Amaranth. Phen: May-Oct. Hab: Disturbed areas. Dist: Native of c. and e. North America, now nearly worldwide in distribution and the original native range difficult or impossible to determine.

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, C, F, FNA4, G, GrPl, Il, K1, K3, K4, Mex, Mi, Mo2, NcTx, NE, NY, Ok, Pa, RAB, S, S13, Tat, Tn, Va, W, WH3, Bayón (2015), Costea & Tardif (2003b); = Amaranthus retroflexus L. var. retroflexus; > Amaranthus retroflexus L. var. retroflexus – Tx; > Amaranthus retroflexus L. var. salicifolius I.M.Johnst. – Tx

Links to other floras: = Amaranthus retroflexus - FNA4

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC
  • Eastern Mountains and Piedmont: FACU
  • Great Plains: FACU
  • Midwest: FACU
  • Northcentral & Northeast: FACU

Heliophily ⓘ: 8

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image of plant© Aidan Campos source | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷
image of plant© Bill Harms | Original Image ⭷

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See something wrong or missing on about Amaranthus retroflexus? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.