Amaranthus retroflexus Linnaeus. Common name: Rough Pigweed, Redroot, Redroot Amaranth. Phenology: May-Oct. Habitat: Disturbed areas. Distribution: 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, Can, F, FNA4, G, GrPl, Il, 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. Basionym: Amaranthus retroflexus L. 1753
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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© Aidan Campos source | Original Image ⭷
© Aidan Campos source | Original Image ⭷
© Aidan Campos source | Original Image ⭷
© Aidan Campos source | Original Image ⭷
© Bill Harms | Original Image ⭷Feedback
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Horticultural Information
Intro: Erect annual from a thick, pink taproot, found in disturbed areas. Native of c. and e. North America, now nearly worldwide in distribution.
Stems: Stems stout, sparingly branched, light green with fine, white, longitudinal lines and hairy.
Leaves: Leaves alternate, petiolate, oval to diamond-shaped with a bluntly pointed tip, 2-6 in. long, with slightly wavy margins, hairy underneath at least on veins.
Inforescence: Flowers in a large, dense terminal panicle and some shorter, simple spikes from middle and upper leaf axils; green to silvery-green, minute, each resting on 1 or more spiny-pointed bracts.
Flowers:
Fruits: Fruit a blackish-brown seed surrounded by a membrane.
Comments:
Height: 1-3 ft.
plant sale text:
bloom table text:
description: Erect annual from a thick, pink taproot, found in disturbed areas. Native of c. and e. North America, now nearly worldwide in distribution.
stems: Stems stout, sparingly branched, light green with fine, white, longitudinal lines and hairy.
leaves: Leaves alternate, petiolate, oval to diamond-shaped with a bluntly pointed tip, 2-6 in. long, with slightly wavy margins, hairy underneath at least on veins.
inflorescence: Flowers in a large, dense terminal panicle and some shorter, simple spikes from middle and upper leaf axils; green to silvery-green, minute, each resting on 1 or more spiny-pointed bracts.
flowers:
fruits: Fruit a blackish-brown seed surrounded by a membrane.
comments:
cultural notes:
germination code:
native range:
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