Editing Amaranth

{{short description|Genus of plants}}
{{distinguish|Amaranthe}}
{{About|the plant genus ''Amaranthus''||}}
{{Automatic taxobox
|name              = 
|image             = Amaranthus tricolor0.jpg
|image_caption     = ''[[Amaranthus tricolor]]''
|taxon             = Amaranthus
|authority         = [[Carl Linnaeus|L.]]
|subdivision_ranks = Species
|subdivision       = See text
}}

'''''Amaranthus''''' is a [[cosmopolitan distribution|cosmopolitan]] group of more than 50 species which make up the [[genus]] of [[annual plant|annual]] or short-lived [[perennial plant]]s collectively known as '''amaranths'''. Some of the better known names include "[[prostrate pigweed]]" and "[[Amaranthus caudatus|love lies bleeding]]".<ref>{{cite book |last1=St. Clair |first1=Kassia |title=The Secret Lives of Color |date=24 October 2017 |publisher=Penguin Group |isbn=978-0143131144 |pages=130}}</ref><ref>{{Cite encyclopedia |title=Amaranthaceae {{!}} plant family |url=https://www.britannica.com/EBchecked/topic/18481/Amaranthaceae#ref230955 |encyclopedia=[[Encyclopædia Britannica]] |access-date=2015-06-02 }}</ref> Some amaranth species are cultivated as [[leaf vegetable]]s, [[pseudocereal]]s, and [[ornamental plant]]s.<ref name="Bensch">{{cite journal |author=Bensch |display-authors=etal |year=2003 |title=Interference of redroot pigweed (''Amaranthus retroflexus''), Palmer amaranth (''A. palmeri''), and common waterhemp (''A. rudis'') in soybean |journal=Weed Science |volume=51 |pages=37–43 |doi=10.1614/0043-1745(2003)051[0037:IORPAR]2.0.CO;2|s2cid=86018188 }}</ref>

[[Catkin]]-like [[cymes]] of densely-packed [[flowers]] grow in summer or fall.<ref>{{cite book |url=https://archive.org/details/azencyclopediaof0000unse |title=RHS A–Z encyclopedia of garden plants |publisher=[[Dorling Kindersley]] |year=2008 |isbn=978-1405332965 |pages=1136 |url-access=registration}}</ref> Amaranth varies in flower, leaf, and stem color with a range of striking [[Plant pigments|pigments]] from the spectrum of maroon to crimson and can grow longitudinally from {{convert|3|to|8|ft|m|round=0.5|abbr=off|order=flip}} tall with a cylindrical, [[Succulent plant|succulent]], fibrous stem that is hollow with grooves and [[bract]]eoles when mature.<ref name="schmid" />
There are approximately 75 species in the genus, 10 of which are [[dioecious]] and native to North America, and the remaining 65 are [[monoecious]] species that are [[endemic]] to every continent (except Antarctica) from tropical lowlands to the Himalayas.<ref>{{Cite journal |last=Steckel |first=Lawrence E. |date=April 2007 |title=The Dioecious ''Amaranthus'' spp.: Here to Stay |journal=Weed Technology |language=en |volume=21 |issue=2 |pages=567–570 |doi=10.1614/WT-06-045.1 |s2cid=84733087}}</ref> Members of this genus share many characteristics and uses with members of the closely related genus ''[[Celosia]]''. [[Amaranth grain]] is collected from the genus. The leaves of some species are also eaten.<ref>{{cite news |last1=Wong |first1=James |date=9 February 2020 |title=Amaranth tastes as good as it looks |work=The Guardian |url=https://www.theguardian.com/lifeandstyle/2020/feb/09/james-wong-on-gardens-amaranth-indonesian-spinach}}</ref>

== Names and etymology ==
''Amaranthus'' comes from the name of this plant in [[Ancient Greek]], {{langx|grc|ἀμάραντος|amárantos}}, "amaranth, immortal", noun formed from the privative prefix {{langx|grc|ἀ-|a-}}, "without", and the verb {{langx|grc|μαραίνω|maraínō}}, "to consume, to exhaust".<ref>{{cite encyclopedia |first=Anatole |last=Bailly |editor-first1=Hugo |editor-last1=Chávez |editor-first2=Gérard |editor-last2=Gréco |editor-first3=André |editor-last3=Charbonnet |editor-first4=Mark |editor-last4=De Wilde |editor-first5=Bernard |editor-last5=Maréchal |display-authors=et al|dictionary=Le Bailly |year=2020 |url=https://bailly.app/marain%C3%B4 |access-date=29 December 2023 |title=μαραίνω}}</ref><ref>[[Dioscorides]], 3, 9; 4, 55 and 57.</ref> Indeed, the amaranth has a reputation for not withering, with in particular its [[Calyx (botany)|calice]] which remains persistent, and for this reason, represents a symbol of [[immortality]].<ref>{{cite web|title=Histoire Amarante|url=http://www.amaranto.cl/noticia/historia-del-amaranto.html|website=www.amaranto.cl |date=|language=es}}</ref> Some species are used in dry bouquets.

The form {{lang|la|amaranthus}} (with H), comes from an erroneous association with the Greek etymon {{Transliteration|grc|anthos}} (lat. {{lang|la|-anthus}}) meaning {{gloss|flower}}, found in the name of many plants (agapanthus, for example).

Its denominations in the languages of the peoples cultivating it since ancient times in [[America]] are {{lang|nah|huauhtli}} in [[Nahuatl]],<ref>{{cite encyclopedia |first=Frances |last=Karttunen |year=1992 |title=An Analytical Dictionary of Nahuatl |publisher=University of Oklahoma Press |page=82}}</ref> {{lang|qu|kiwicha}}, {{lang|qu|ataĉo}} in [[Quechuan languages|Quechua]],<ref>{{cite journal |url=https://www.persee.fr/doc/caoum_0373-5834_1992_num_45_179_3461 |journal=Cahiers d'Outre-Mer |language=fr |volume=45 |issue=179–180 |date=July–December 1992 |first=Emmanuelle |last=Gen |title=La re-découverte des Amériques |pages=495–514|doi=10.3406/caoum.1992.3461 }}</ref> {{lang|myn|tez}} or {{lang|myn|xtes}} in [[Mayan languages|Maya]], ''ahparie'' in [[Purépecha language|Purépecha]], {{lang|hch|wa've}} in [[Huichol language|Huichol]], and ''guegui'' in [[Tarahumara language|Tarahumara]].{{citation needed|date=July 2024}}

== Description ==
[[File:Amaranth und WW.jpg|thumb|Amaranth grain (left) and [[wheat]] (right)]]

Amaranth is a [[herbaceous plant]] or [[shrub]] that is either annual or [[Perennial plant|perennial]] across the genus.<ref name="schmid">{{cite journal|display-authors=3 |last1=Schmid |first1=Rudolf |last2=Judd |first2=Walter S. |last3=Campbell |first3=Christopher S. |last4=Kellogg |first4=Elizabeth A. |last5=Stevens |first5=Peter F. |last6=Donoghue |first6=Michael J. |last7=Judd |first7=Walter S. |last8=Nickrent |first8=Daniel L. |last9=Robertson |first9=Kenneth R. | last10=Abbott | first10=J. Richard |last11=Campbell |first11=Christopher S. |last12=Carlsward |first12=Barbara S. |last13=Donoghue |first13=Michael J. |last14=Kellogg |first14=Elizabeth A. |title=Plant Systematics: A Phylogenetic Approach |journal=Taxon |volume=56 |issue=4 |date=1 October 2007 |issn=0040-0262 |doi=10.2307/25065934 |page=1316 |jstor=25065934}}</ref> Flowers vary interspecifically from the presence of 3 or 5 [[tepal]]s and [[stamen]]s, whereas a 7-[[Pollen|porate]] pollen grain structure remains consistent across the family.<ref name=schmid/> Species across the genus contain concentric rings of [[vascular bundle]]s, and fix carbon efficiently with a [[C4 carbon fixation|C4 photosynthetic]] pathway.<ref name=schmid/> Leaves are approximately {{convert|6.5|-|15|cm|in|frac=4|abbr=off}} and of oval or elliptical shape that are either opposite or alternate across species, although most leaves are whole and simple with entire margins.<ref name=schmid/>

Amaranth has a primary root with deeper spreading secondary fibrous root structures.<ref name="Arrequez etal">{{Cite journal |last1=Arreguez |first1=Guillermo A. |last2=Martínez |first2=Jorge G. |last3=Ponessa |first3=Graciela |date=September 2013 |title=''Amaranthus hybridus'' L. ssp. ''hybridus'' in an archaeological site from the initial mid-Holocene in the Southern Argentinian Puna |journal=Quaternary International |volume=307 |pages=81–85 |doi=10.1016/j.quaint.2013.02.035 |bibcode=2013QuInt.307...81A|hdl=11336/21990 |hdl-access=free }}</ref> [[Inflorescence]]s are in the form a large [[panicle]] that varies from terminal to axial, color, and sex. The tassel of fluorescence is either erect or bent and varies in width and length between species. Flowers are radially symmetric and either bisexual or unisexual with very small, bristly [[perianth]] and pointy [[bract]]s.<ref name="Arrequez etal" /> Species in this genus are either [[monecious]] (e.g. ''[[Amaranthus hybridus|A.&nbsp;hybridus]],'') or [[dioecious]] (e.g. ''[[Amaranthus palmeri|A.&nbsp;palmeri]]'').<ref name="Arrequez etal" /> Fruits are in the form of capsules referred to as a ''[[unilocular]] pixdio'' that opens at maturity.<ref name="Arrequez etal" /> The top ([[operculum (botany)|operculum]]) of the unilocular pixdio releases the urn that contains the seed.<ref name="Arrequez etal" /> Seeds are circular form from 1 to 1.5 millimeters in diameter and range in color with a shiny, smooth seed coat.<ref name="Arrequez etal" /> The panicle is harvested 200 days after cultivation with approximately 1,000 to 3,000 seeds harvested per gram.<ref name="Tucker 1986">{{Cite journal |last=Tucker |first=Jonathan B. |date=January 1986 |title=Amaranth: The Once and Future Crop |journal=BioScience |volume=36 |issue=1 |pages=9–13 |doi=10.2307/1309789 |issn=0006-3568 |jstor=1309789}}</ref>

===Chemistry===
Amaranth grain contains [[phytochemical]]s that are not defined as nutrients and may be [[antinutrient]] factors, such as [[polyphenol]]s, [[saponin]]s, [[tannin]]s, and [[oxalate]]s. These compounds are reduced in content and antinutrient effect by cooking.<ref>{{cite web |year=1992 |title=Legacy: The Official Newsletter of Amaranth Institute |url=http://www.ars-grin.gov/ars/MidWest/Ames/repository/oldsitearchive/Reports_New/Special_Reports/Amaranth/Legacy92.pdf |url-status=dead |archive-url=https://web.archive.org/web/20121012191437/http://www.ars-grin.gov/ars/MidWest/Ames/repository/oldsitearchive/Reports_New/Special_Reports/Amaranth/Legacy92.pdf |archive-date=2012-10-12 |access-date=2011-09-19 |publisher=Amaranth Institute |pages=6–9}}</ref><ref>{{cite journal |vauthors=Hotz C, Gibson RS |year=2007 |title=Traditional food-processing and preparation practices to enhance the bioavailability of micronutrients in plant-based diets |journal=J Nutr |volume=137 |issue=4 |pages=1097–100 |doi=10.1093/jn/137.4.1097 |pmid=17374686 |doi-access=free}}</ref>

== Taxonomy ==
''Amaranthus'' shows a wide variety of morphological diversity among and even within certain species. ''Amaranthus'' is part of the Amaranthaceae that is part of the larger grouping of the Carophyllales.<ref name=schmid/> Although the family ([[Amaranthaceae]]) is distinctive, the [[genus]] has few distinguishing characters among the 75 species present across six continents.<ref name=stetter1/> This complicates [[taxonomy (biology)|taxonomy]] and ''Amaranthus'' has generally been considered among systematists as a "difficult" genus and to hybridize often.<ref name="Costea">{{cite journal |last1=Costea |first1=Mihai |last2=DeMason |first2=Darleen A. |s2cid=84211686 |title=Stem Morphology and Anatomy in ''Amaranthus'' L. (Amaranthaceae), Taxonomic Significance |journal=Journal of the Torrey Botanical Society |volume=128 |issue=3 |year=2001 |issn=1095-5674 |doi=10.2307/3088717 |page=254 |jstor=3088717}}</ref>

In 1955, Sauer classified the genus into two subgenera, differentiating only between monoecious and dioecious species: ''Acnida'' (L.) Aellen ex K.R. Robertson and ''Amaranthus''.<ref name="Costea" /> Although this classification was widely accepted, further infrageneric classification was (and still is) needed to differentiate this widely diverse group. Mosyakin and Robertson 1996 later divided into three subgenera: Acnida, Amaranthus, and Albersia.<ref>{{Cite journal |last1=Mosyakin |first1=Sergei L. |last2=Clemants |first2=Steven E. |date=1996 |title=New Infrageneric Taxa and Combinations in Chenopodium L. (Chenopodiaceae) |journal=Novon |volume=6 |issue=4 |pages=398 |doi=10.2307/3392049 |issn=1055-3177 |jstor=3392049 |url=https://www.biodiversitylibrary.org/part/28372}}</ref> The support for the addition of the subdivision Albersia because of its [[Dehiscence (botany)|indehiscent]] fruits coupled with three elliptic to linear [[tepal]]s to be exclusive characters to members of this subgenus. The classification of these groups are further supported with a combination of  floral characters, reproductive strategies, geographic distribution, and molecular evidence.<ref name="stetter1">{{Cite journal|journal=Molecular Phylogenetics and Evolution|volume=109|pages=80–92|date=April 2017|title=Analysis of phylogenetic relationships and genome size evolution of the ''Amaranthus'' genus using GBS indicates the ancestors of an ancient crop |last1=Stetter |first1=Markus G. |last2=Schmid |first2=Karl J|doi=10.1016/j.ympev.2016.12.029|pmid=28057554 |doi-access=free|bibcode=2017MolPE.109...80S }}</ref><ref name="wasel">{{Cite journal |last1=Waselkov |first1=Katherine E. |last2=Boleda |first2=Alexis S. |last3=Olsen |first3=Kenneth M. |date=2018-06-21 |title=A Phylogeny of the Genus ''Amaranthus'' (Amaranthaceae) Based on Several Low-Copy Nuclear Loci and Chloroplast Regions |journal=Systematic Botany |volume=43 |issue=2 |pages=439–458 |doi=10.1600/036364418x697193 |s2cid=49568120 |issn=0363-6445}}</ref><ref>{{Cite journal |last1=Clouse |first1=J. W. |last2=Adhikary |first2=D. |last3=Page |first3=J. T. |last4=Ramaraj |first4=T.|last5=Deyholos |first5=M. K. |last6=Udall |first6=J. A. |last7=Fairbanks |first7=D. J. |last8=Jellen |first8=E. N. |last9=Maughan |first9=P. J. |date=2016 |title=The Amaranth Genome: Genome, Transcriptome, and Physical Map Assembly |journal=The Plant Genome |volume=9 |issue=1 |pages=0 |doi=10.3835/plantgenome2015.07.0062 |pmid=27898770 |issn=1940-3372 |doi-access=free}}</ref>

The phylogenies of ''Amaranthus'' using [[Maximum parsimony (phylogenetics)|maximum parsimony]] and [[Bayesian inference|Bayesian]] analysis of [[Nuclear gene|nuclear]] and [[chloroplast]] [[gene]]s suggest five [[clade]]s within the genus: Diecious / Pumilus, Hybris, Galapagos, Eurasian/ South African, Australian (ESA), ESA + South American.<ref name=wasel/>

''Amaranthus'' includes three recognised subgenera and 75 species, although species numbers are questionable due to [[Hybrid (biology)|hybridisation]] and species concepts.<ref name=schmid/> Infrageneric classification focuses on inflorescence, flower characters and whether a species is monoecious/dioecious, as in the Sauer (1955) suggested classification.<ref name=stetter1/> Bracteole morphology present on the stem is used for taxonomic classification of Amaranth. Wild species have longer bracteoles compared to cultivated species.<ref name = "Costea" /> A modified infrageneric classification of ''Amaranthus'' includes three subgenera: ''[[Amaranthus tuberculatus|Acnida]]'', ''Amaranthus'', and ''Albersia'', with the taxonomy further differentiated by sections within each of the subgenera.<ref>{{cite journal |author1=Sergei L. Mosyakin |author2=Kenneth R. Robertson |year=1996 |title=New infrageneric taxa and combinations in ''Amaranthus'' (Amaranthaceae) |journal=Ann. Bot. Fennici |volume=33 |issue=4 |pages=275–281 |jstor=23726306}}</ref>

There is near certainty that ''[[Amaranthus hypochondriacus|A. hypochondriacus]]'' is the common ancestor to the cultivated grain species, however the later series of domestication to follow remains unclear. There has been opposing hypotheses of a single as opposed to multiple domestication events of the three grain species.<ref name=stetter1/><ref name="joshi">{{Cite journal |last1=Joshi |first1=Dinesh C. |last2=Sood |first2=Salej |last3=Hosahatti |first3=Rajashekara |last4=Kant |first4=Lakshmi |last5=Pattanayak |first5=A. |last6=Kumar |first6=Anil |last7=Yadav |first7=Dinesh |last8=Stetter |first8=Markus G. |date=2018-07-10 |title=From zero to hero: the past, present and future of grain amaranth breeding |journal=Theoretical and Applied Genetics |volume=131 |issue=9 |pages=1807–1823 |doi=10.1007/s00122-018-3138-y |pmid=29992369 |s2cid=49669284 |issn=0040-5752}}</ref> There is evidence of phylogenetic and geographical support for clear groupings that indicate separate domestication events in South America and Central America.<ref name=stetter1/> ''A.&nbsp;hybridus'' may derive from South America, whereas ''A.&nbsp;caudatus'', ''A.&nbsp;hypochondriacus'', and ''A.&nbsp;quentiensis'' are native to Central and North America.<ref name=stetter1/><ref name=joshi/>

=== Species ===
{{Main|List of Amaranthus species|l1 = List of ''Amaranthus'' species}}

Species include:<ref name="TPL">{{cite web |title=Search results—The Plant List |url=http://www.theplantlist.org/tpl/search?q=amaranthus |work=theplantlist.org}}</ref><ref>{{Cite journal |last1=Kumar |first1=Thaliyangal Rajesh |last2=Vishnu |first2=Walsan Kalarikkal |last3=Kumar |first3=Venugopalan Nair Saradamma Anil |last4=Arya |first4=Sindu |date=2019-05-13 |title=Amaranthus saradhiana (Amaranthaceae)—a new species from southern Western Ghats of Kerala, India |journal=Phytotaxa |language=en |volume=403 |issue=3 |pages=230–238 |doi=10.11646/phytotaxa.403.3.7 |issn=1179-3163 |s2cid=181814195}}</ref>

{{Div col|colwidth=30em}}
* ''[[Amaranthus acanthochiton]]'' – greenstripe
* ''Amaranthus acutilobus'' – a synonym of ''[[Amaranthus viridis]]''<ref name=TPL/>
* ''[[Amaranthus albus]]'' – white pigweed, tumble pigweed
* ''[[Amaranthus anderssonii]]''
* ''[[Amaranthus arenicola]]'' – sandhill amaranth
* ''[[Amaranthus australis]]'' – southern amaranth
* ''[[Amaranthus bigelovii]]'' – Bigelow's amaranth
* ''[[Amaranthus blitoides]]'' – mat amaranth, prostrate amaranth, prostrate pigweed
* ''[[Amaranthus blitum]]'' – purple amaranth
* ''[[Amaranthus brownii]]'' – Brown's amaranth
* ''[[Amaranthus californicus]]'' – California amaranth, California pigweed
* ''[[Amaranthus cannabinus]]'' – tidal-marsh amaranth
* ''[[Amaranthus caudatus]]'' – love-lies-bleeding, pendant amaranth, tassel flower, ''quilete''
* ''[[Amaranthus chihuahuensis]]'' – Chihuahuan amaranth
* ''[[Amaranthus crassipes]]'' – spreading amaranth
* ''[[Amaranthus crispus]]'' – crispleaf amaranth
* ''[[Amaranthus cruentus]]'' – purple amaranth, red amaranth, Mexican grain amaranth
* ''[[Amaranthus deflexus]]'' – large-fruit amaranth
* ''[[Amaranthus dubius]]'' – spleen amaranth, ''khada sag''
* ''[[Amaranthus fimbriatus]]'' – fringed amaranth, fringed pigweed
* ''[[Amaranthus floridanus]]'' – Florida amaranth
* ''[[Amaranthus furcatus]]''
* ''[[Amaranthus graecizans]]''
* ''[[Amaranthus grandiflorus]]''
* ''[[Amaranthus greggii]]'' – Gregg's amaranth
* ''[[Amaranthus hybridus]]'' – smooth amaranth, smooth pigweed, red amaranth
* ''[[Amaranthus hypochondriacus]]'' – Prince-of-Wales feather, prince's feather
* ''[[Amaranthus interruptus]]'' – Australian amaranth<ref>{{Cite web |title=Type of Amaranthus interruptus R.Br. [family AMARANTHACEAE] on JSTOR |url=https://plants.jstor.org/stable/10.5555/al.ap.specimen.bm000847082 |access-date=2020-10-08 |website=plants.jstor.org}}</ref>
* ''[[Amaranthus minimus]]''
* ''[[Amaranthus mitchellii]]''
* ''[[Amaranthus muricatus]]'' – African amaranth<ref>{{Cite web |title=Amaranthus muricatus (Moquin-Tandon) Hieronymus [family AMARANTHACEAE] on JSTOR |url=https://plants.jstor.org/stable/10.5555/al.ap.flora.fna004000844?searchUri=filter=name&so=ps_group_by_genus_species+asc&Query=Amaranthus+muricatus+ |access-date=2020-10-08 |website=plants.jstor.org}}</ref>
* ''[[Amaranthus obcordatus]]'' – Trans-Pecos amaranth
* ''[[Amaranthus palmeri]]'' – Palmer's amaranth, Palmer pigweed, careless weed
* ''[[Amaranthus polygonoides]]'' – tropical amaranth
* ''[[Amaranthus powellii]]'' – green amaranth, Powell amaranth, Powell pigweed
* ''[[Amaranthus pringlei]]'' – Pringle's amaranth
* ''[[Amaranthus pumilus]]'' – seaside amaranth
* ''[[Amaranthus quitensis]]'' - Mucronate Amaranth
* ''[[Amaranthus retroflexus]]'' – red-root amaranth, redroot pigweed, common amaranth
* ''[[Amaranthus saradhiana]]'' - purpal stem amaranth, green leaf amaranth
* ''Amaranthus scleranthoides'' – variously ''[[Amaranthus sclerantoides]]''
* ''[[Amaranthus scleropoides]]'' – bone-bract amaranth
* ''[[Amaranthus spinosus]]'' – spiny amaranth, prickly amaranth, thorny amaranth
* ''[[Amaranthus standleyanus]]''
* ''[[Amaranthus thunbergii]]'' – Thunberg's amaranth
* ''[[Amaranthus torreyi]]'' – Torrey's amaranth
* ''[[Amaranthus tricolor]]'' – Joseph's-coat
* ''[[Amaranthus tuberculatus]]'' – rough-fruit amaranth, tall waterhemp
* ''[[Amaranthus viridis]]'' – slender amaranth, green amaranth
* ''[[Amaranthus watsonii]]'' – Watson's amaranth
* ''[[Amaranthus wrightii]]'' – Wright's amaranth
{{div col end}}

=== Etymology ===
"Amaranth" derives from [[Ancient Greek|Greek]] {{lang|grc|ἀμάραντος}}<ref>{{LSJ|a)ma/rantos|ἀμάραντος|ref}}</ref> ({{lang|grc-Latn|amárantos}}), "unfading", with the Greek word for "flower", {{lang|grc|ἄνθος}} ({{lang|grc-Latn|ánthos}}), factoring into the word's development as ''amaranth, the unfading flower''. ''Amarant'' is an archaic variant. The name was first applied to the related ''[[Celosia]]'' (''Amaranthus'' and ''Celosia'' share long-lasting dried flowers), as ''Amaranthus'' plants were not yet known in Europe.<ref>{{Cite journal |last1=Costea |first1=Mihai |last2=Tardif |first2=François J. |date=2003 |title=The Name of the Amaranth: Histories of Meaning |journal=SIDA, Contributions to Botany |volume=20 |issue=3 |pages=1073–1083 |issn=0036-1488 |jstor=41968150}}</ref>

== Ecology ==
Amaranth weed species have an extended period of germination, rapid growth, and high rates of seed production,<ref name="Bensch" /> and have been causing problems for farmers since the mid-1990s. This is partially due to the reduction in [[tillage]], reduction in herbicidal use and the evolution of herbicidal resistance in several species where herbicides have been applied more often.<ref>Wetzel et al. (1999). Use of PCR-based molecular markers to identify weedy ''Amaranthus'' species. Weed Science 47: 518–523.</ref> The following 9 species of ''Amaranthus'' are considered invasive and noxious weeds in the U.S. and Canada: ''[[Amaranthus albus|A.&nbsp;albus]]'', ''[[Amaranthus blitoides|A.&nbsp;blitoides]]'', ''[[Amaranthus hybridus|A.&nbsp;hybridus]]'', ''[[Amaranthus palmeri|A.&nbsp;palmeri]]'', ''[[Amaranthus powellii|A.&nbsp;powellii]]'', ''[[Amaranthus retroflexus|A.&nbsp;retroflexus]]'', ''[[Amaranthus spinosus|A.&nbsp;spinosus]]'', ''[[Amaranthus tuberculatus|A.&nbsp;tuberculatus]]'', and ''[[Amaranthus viridis|A.&nbsp;viridis]]''.<ref>[http://plants.usda.gov/java/profile?symbol=AMARA USDA Plant Database. Plants Profile- ''Amaranthus'' L]</ref><ref>[Assad, R., Reshi, Z. A., Jan, S., & Rashid, I. (2017). "Biology of amaranths". The Botanical Review, 83(4), 382–436.]</ref>

A new herbicide-resistant strain of ''A.&nbsp;palmeri'' has appeared; it is [[glyphosate]]-resistant and so cannot be killed by herbicides using the chemical. Also, this plant can survive in tough conditions. The species ''Amaranthus palmeri'' (Palmer amaranth) causes the greatest reduction in [[soybean]] yields and has the potential to reduce yields by 17-68% in field experiments.<ref name="Bensch" /> Palmer amaranth is among the "top five most troublesome weeds" in the southeast of the United States and has already evolved resistances to [[dinitroaniline]] herbicides and [[acetolactate synthase inhibitor]]s.<ref>Culpepper et al. (2006). Glyphosate-resistant Palmer amaranth (''Amaranthus palmeri'') confirmed in Georgia. Weed Science 54: 620–626.</ref> This makes the proper identification of ''Amaranthus'' species at the seedling stage essential for agriculturalists. Proper weed control needs to be applied before the species successfully colonizes in the crop field and causes significant yield reductions.

An evolutionary lineage of around 90 species within the genus has acquired the [[C4 carbon fixation|{{C4}} carbon fixation]] pathway, which increases their photosynthetic efficiency. This probably occurred in the [[Miocene]].<ref name="Sage2016">{{cite journal |last=Sage |first=R.F. |year=2016 |title=A portrait of the {{C4}} photosynthetic family on the 50th anniversary of its discovery: species number, evolutionary lineages, and Hall of Fame |journal=Journal of Experimental Botany |volume=67 |issue=14 |pages=4039–4056 |doi=10.1093/jxb/erw156 |issn=0022-0957 |pmid=27053721 |doi-access=free}}</ref><ref name="SageSage2007">{{cite journal |last1=Sage |first1=R.F. |last2=Sage |first2=T.L. |last3=Pearcy |first3=R.W. |last4=Borsch |first4=T. |year=2007 |title=The taxonomic distribution of {{C4}} photosynthesis in Amaranthaceae sensu stricto |journal=American Journal of Botany |volume=94 |issue=12 |pages=1992–2003 |doi=10.3732/ajb.94.12.1992 |issn=0002-9122 |pmid=21636394}}</ref>

== Uses ==
{{more citations needed|section|date=April 2019}}

All parts of the plant are considered edible,<ref>{{cite web|url=https://www.theguardian.com/environment/2022/aug/20/ancient-crops-climate-crisis-amaranth-fonio-cowpeas-taro-kernza |title=Diet for a hotter climate: five plants that could help feed the world |last=Nowell |first=Cecelia |website=The Guardian |date=20 August 2022 |access-date=5 September 2023 |quote=From leaf to seed, the entirety of the amaranth plant is edible.}}</ref> though some may have sharp spines that need to be removed before consumption.<ref>{{Cite book |url=https://www.worldcat.org/oclc/277203364 |title=The Complete Guide to Edible Wild Plants |publisher=Skyhorse Publishing|author= United States Department of the Army |year=2009 |isbn=978-1-60239-692-0 |location=New York |pages=19 |oclc=277203364}}</ref> Amaranth is high in [[Oxalic acid|oxalates]], but this may be partially offset by its high calcium content.<ref>{{Cite journal |last1=Radek |first1=M. |last2=Savage |first2=G. P. |date=2008 |title=Oxalates in some Indian green leafy vegetables |url=https://pubmed.ncbi.nlm.nih.gov/18335334/#:~:text=Spinach,%20purple%20and%20green%20amaranth,mg/100%20g%20dry%20matter. |journal=International Journal of Food Sciences and Nutrition |volume=59 |issue=3 |pages=246–260 |doi=10.1080/09637480701791176 |issn=0963-7486 |pmid=18335334}}</ref>

{{gallery|mode=packed
|Tostando amaranto en comal de barro.jpg|Amaranth being roasted in a [[Comal (cookware)|comal]]
|Amaranth muesli.jpg|Amaranth muesli mix
|Día de muertos.jpg|Skull shapes made of amaranth and honey for [[Day of the Dead]] in Mexico
|Dulce de amaranto..JPG|[[Alegría (Mexican candy)|Alegría]], traditional Mexican candy made with amaranth
}}

=== Nutrition ===

Uncooked [[amaranth grain]] by weight is 12% water, 65% [[carbohydrate]]s (including 7% [[dietary fiber]]), 14% [[protein]], and 7% [[fat]] (table). A {{convert|100|g|oz|abbr=off|adj=on|frac=2}} reference serving of uncooked amaranth grain provides {{convert|371|kcal|kJ|order=flip|abbr=off}} of [[food energy]], and is a rich source (20% or more of the [[Daily Value]], DV) of [[protein]], [[dietary fiber]], [[pantothenic acid]], [[vitamin B6]], [[folate]], and several [[mineral (nutrient)|dietary minerals]] (table). Uncooked amaranth is particularly rich in [[manganese]] (159% DV), [[phosphorus]] (80% DV), [[magnesium]] (70% DV), [[iron]] (59% DV), and [[selenium]] (34% DV). Amaranth has a high oxalate content.
{{nutritional value | name=Amaranth grain, uncooked
| kJ=1554
| protein=13.56 g
| fat=7.02 g
| satfat=1.459 g
| monofat=1.685 g
| polyfat=2.778 g
| carbs=65.25 g
| fiber=6.7 g
| sugars=1.69 g
| starch=57.27 g
| calcium_mg=159
| iron_mg=7.61
| magnesium_mg=248
| phosphorus_mg=557
| potassium_mg=508
| sodium_mg=4
| zinc_mg=2.87
| manganese_mg=3.333
| vitC_mg=4.2
| thiamin_mg=0.116
| riboflavin_mg=0.2
| niacin_mg=0.923
| pantothenic_mg=1.457
| vitB6_mg=0.591
| folate_ug=82
| vitE_mg=1.19
| tryptophan=0.181 g
| threonine=0.558 g
| isoleucine=0.582 g
| leucine=0.879 g
| lysine=0.747 g
| methionine=0.226 g
| cystine=0.191 g
| phenylalanine=0.542 g
| tyrosine=0.329 g
| valine=0.679 g
| arginine=1.060 g
| histidine=0.389 g
| alanine=0.799 g
| aspartic acid=1.261 g
| glutamic acid=2.259 g
| glycine=1.636 g
| proline=0.698 g
| serine=1.148 g
| opt1n=Selenium
| opt1v=18.7 µg
| water=11.3 g
| source_usda = 1
| note=[https://fdc.nal.usda.gov/fdc-app.html#/food-details/170682/nutrients Full Link to USDA Database entry]
}}

{{nutritional value | name=Amaranth grain, Cooked
| kJ=429
| protein=3.8 g
| fat=1.58 g
| carbs=18.7 g
| fiber=2.1 g
| starch=16.2 g
| calcium_mg=47
| iron_mg=2.1
| magnesium_mg=65
| phosphorus_mg=148
| potassium_mg=135
| sodium_mg=6
| zinc_mg=0.86
| manganese_mg=0.854
| thiamin_mg=0.015
| riboflavin_mg=0.022
| niacin_mg=0.235
| pantothenic_mg=1.457
| vitB6_mg=0.113
| folate_ug=22
| vitE_mg=0.88
| opt1n=Selenium
| opt1v=5.5 µg
| water=75.2 g
| source_usda = 1
| note=[https://fdc.nal.usda.gov/fdc-app.html#/food-details/170683/nutrients]
}}

Cooking decreases its nutritional value substantially across all nutrients, with only dietary minerals remaining at moderate levels.<ref name="nd">{{cite web |title=Amaranth grain, cooked, per 100 g |url=https://nutritiondata.self.com/facts/cereal-grains-and-pasta/10640/2 |publisher=Nutritiondata.com, Conde Nast; from the USDA National Nutrient Database, SR-21 |access-date=20 April 2019 |date=2018}}</ref> Cooked amaranth leaves are a rich source of [[vitamin A]], [[vitamin C]], [[calcium]], and manganese, with moderate levels of folate, iron, magnesium, and [[potassium]].<ref>{{cite web |url=http://nutritiondata.self.com/facts/vegetables-and-vegetable-products/2304/2 |title=Amaranth leaves, cooked, boiled, drained, without salt, per 100 g |publisher=Nutritiondata.com, Conde Nast; from the USDA National Nutrient Database, SR-21 |date=2018 |access-date=20 April 2019}}</ref> Amaranth does not contain [[gluten]].<ref name="LamacchiaCamarca2014">{{cite journal |vauthors=Lamacchia C, Camarca A, Picascia S, Di Luccia A, Gianfrani C |title=Cereal-based gluten-free food: how to reconcile nutritional and technological properties of wheat proteins with safety for celiac disease patients |journal=Nutrients |volume=6 |issue=2 |pages=575–90 |date=Jan 29, 2014 |pmid=24481131 |pmc=3942718 |doi=10.3390/nu6020575 |type=Review| doi-access=free}}</ref><ref name="PenaginiDilillo2013">{{cite journal |vauthors=Penagini F, Dilillo D, Meneghin F, Mameli C, Fabiano V, Zuccotti GV |title=Gluten-free diet in children: an approach to a nutritionally adequate and balanced diet |journal=Nutrients |volume=5 |issue=11 |pages=4553–65 |date=Nov 18, 2013 |pmid=24253052 |pmc=3847748 |doi=10.3390/nu5114553 |type=Review |doi-access=free}}</ref><ref>{{cite journal |title=Recent advances in the formulation of gluten-free cereal-based products |journal=Trends in Food Science & Technology |first=E. |last=Gallagher |author2=T. R. Gormley |author3=E. K. Arendt |volume=15 |issue=3–4 |pages=143–152 |url=https://www.researchgate.net/publication/228866803 |doi=10.1016/j.tifs.2003.09.012 |type=Review |year=2004}}</ref>

=== History ===
The native range of the genus is cosmopolitan.<ref name="Tucker 1986" />  In pre-Hispanic times, amaranth was cultivated by the Aztec and their tributary communities in a quantity very similar to maize.<ref>Mapes, Cristina, Eduardo Espitia, and Scott Sessions. "Amaranth." In ''The Oxford Encyclopedia of Mesoamerican Cultures''. : Oxford University Press, 2001. {{ISBN|0195108159}}</ref>  Known to the [[Aztecs]] as {{lang|nci|huāuhtli}},<ref>{{cite book |author=Coe, S.D. |year=1994 |title=America's First Cuisines |publisher=University of Texas Press |isbn=9780292711594 |url=https://archive.org/details/americasfirstcui00coes |url-access=registration}}</ref> amaranth is thought to have represented up to 80% of their energy consumption before the [[Spanish conquest of the Aztec Empire|Spanish conquest]].{{Citation needed|date=April 2024}} Another important use of amaranth throughout [[Mesoamerica]] was in ritual drinks and foods. To this day, [[amaranth grain]]s are toasted much like popcorn and mixed with [[honey]], [[molasses]], or [[chocolate]] to make a treat called {{lang|es|[[Alegría (Mexican candy)|alegría]]}}, meaning "joy" in Spanish.

While all species are believed to be native to the Americas, several have been cultivated and introduced to warm regions worldwide. Amaranth's cosmopolitan distribution makes it one of many plants providing evidence of [[Pre-Columbian transoceanic contact theories|pre-Columbian oceanic contact]].<ref>{{Cite web |title=Singh Anurudh K (2017) Early History of Crop Introductions into India: II. ''Amaranthus'' (L.) spp. Asian Agri-History 21(4): 319-324 |url=https://www.researchgate.net/publication/322329859 |access-date=2020-08-27 |website=ResearchGate |language=en}}</ref><ref>{{Cite journal |last1=Sorenson |first1=John L. |last2=Johannessen |first2=Carl L. |date=April 2004 |title=Scientific Evidence for Pre-Columbian Transoceanic Voyages |url=http://www.sino-platonic.org/complete/spp133_precolumbian_voyages.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://www.sino-platonic.org/complete/spp133_precolumbian_voyages.pdf |archive-date=2022-10-09 |url-status=live |journal=Sino-Platonic Papers |volume=133}}</ref> The earliest archeological evidence for amaranth in the Old World was found in an excavation in Narhan, India, dated to 1000–800&nbsp;BCE.<ref>{{cite book |last1=Saraswat |first1=K.S. |last2=Sharma |first2=N.K. |last3=Saini |first3=D.C. |title=Plant Economy at Ancient Narhan (ca. 1300 B.C.-300/400 A.D.) in Excavations at Narhan (1984-1989), Appendix IV |date=1994 |publisher=Department of Ancient Indian History, Culture and Archaeology, Banaras Hindu University |location=Varanasi, Uttar Pradesh, India |pages=225–337}}</ref>

Because of its importance as a symbol of indigenous culture, its palatability, ease of cooking, and a protein that is particularly well-suited to human nutritional needs, interest in amaranth seeds (especially ''A.&nbsp;cruentus'' and ''A.&nbsp;hypochondriacus'') revived in the 1970s. It was recovered in Mexico from wild varieties<ref>{{Cite web|title=Amaranth - May Grain of the Month {{!}} The Whole Grains Council|url=https://wholegrainscouncil.org/whole-grains-101/grain-month-calendar/amaranth-may-grain-month|access-date=2021-12-28|website=wholegrainscouncil.org}}</ref> and is now commercially cultivated. It is a popular snack in Mexico, sometimes mixed with chocolate or puffed rice, and its use has spread to Europe and other parts of North America.

=== Seed ===
Several species are raised for amaranth "grain" in Asia and the Americas. Amaranth and its relative [[quinoa]] are considered [[pseudocereal]]s because of their similarities to cereals in flavor and cooking. The spread of ''Amaranthus'' is of a joint effort of human expansion, adaptation, and fertilization strategies. Grain amaranth has been used for food by humans in several ways. The grain can be ground into a flour for use like other grain flours. It can be popped like popcorn, or flaked like oatmeal.<ref>{{cite web |url=http://corn.agronomy.wisc.edu/crops/amaranth.aspx |title=Amaranth |website=University of Wisconsin - Corn Agronomy |author1=D. H. Putnam |author2=E. S. Oplinger |author3=J. D. Doll |author4=E. M. Schulte |date=November 1989}}</ref>

Seeds of Amaranth grain have been found in [[Antofagasta de la Sierra Department]], [[Catamarca Province|Catamarca]], Argentina in the southern [[Puna de Atacama|Puna]] desert of the north of Argentina dating from 4,500 years ago, with evidence suggesting earlier use.<ref name="Arrequez etal" /> Archeological digs unearthed ''A.&nbsp;cruentus'' seeds in a cave in [[Tehuacán]], Mexico that dated to 6,000 years before present, while other digs in the same caves found ''A.&nbsp;hypochondriacus'' seeds dating to 1500 years before present.<ref>{{Citation |url=https://web.archive.org/web/20250511051625/https://dr.lib.iastate.edu/server/api/core/bitstreams/eb7af3d4-ea88-4e87-b8f0-c1da1cf4aaa1/content |last1=Brenner |first1=D. M. |title=Genetic Resources and Breeding of ''Amaranthus'' |date=2010-07-23 |work=Plant Breeding Reviews |pages=227–285 |publisher=John Wiley & Sons, Inc. |isbn=978-0-470-65017-2 |last2=Baltensperger |first2=D. D. |last3=Kulakow |first3=P. A. |last4=Lehmann |first4=J. W. |last5=Myers |first5=R. L. |last6=Slabbert |first6=M. M. |last7=Sleugh |first7=B. B. |doi=10.1002/9780470650172.ch7}}</ref>

Ancient amaranth grains still used include the three species ''[[Amaranthus caudatus]]'', ''[[Amaranthus cruentus|A.&nbsp;cruentus]]'', and ''A.&nbsp;hypochondriacus''.<ref name="Costea06">{{cite journal |last1=Costea |first1=M. |last2=Brenner |first2=D. M. |last3=Tardif |first3=F. J. |last4=Tan |first4=Y. F. |last5=Sun |first5=M. |title=Delimitation of ''Amaranthus cruentus'' L. and ''Amaranthus caudatus'' L. using micromorphology and AFLP analysis: an application in germplasm identification |journal=Genetic Resources and Crop Evolution |date=6 October 2006 |volume=53 |issue=8 |pages=1625–1633 |issn=0925-9864 |doi=10.1007/s10722-005-0036-3}}</ref> Evidence from [[single-nucleotide polymorphism]]s and [[chromosome structure]] supports ''A.&nbsp;hypochondriacus'' as the common ancestor of the three grain species.<ref name="stetter2">{{Cite journal |last1=Stetter |first1=Markus G. |last2=Zeitler |first2=Leo |last3=Steinhaus |first3=Adrian |last4=Kroener |first4=Karoline |last5=Biljecki |first5=Michelle |last6=Schmid |first6=Karl J. |date=2016-06-07 |title=Crossing Methods and Cultivation Conditions for Rapid Production of Segregating Populations in Three Grain Amaranth Species |journal=Frontiers in Plant Science |volume=7 |pages=816 |doi=10.3389/fpls.2016.00816 |pmid=27375666 |pmc=4894896 |issn=1664-462X |doi-access=free}}</ref>

It has been proposed as an inexpensive native crop that could be cultivated by indigenous people in rural areas for several reasons:
* A small amount of seed plants a large area (seeding rate 1&nbsp;kg/ha).
* Yields are high compared to the seeding rate: 1,000&nbsp;kg or more per hectare.
* It is easily harvested and easily processed, post harvest, as there are no hulls to remove.
* Its seeds are a source of protein.<ref name="Tucker 1986" /><ref name=mpoll>De Macvean & Pöll (1997). Chapter 8: Ethnobotany. Tropical Tree Seed Manual, USDA Forest Service, edt. J.A Vozzo.</ref>
* It has rich content of the [[dietary mineral]]s, calcium, magnesium, phosphorus, and potassium.<ref name=usdamrth/>
* In cooked and edible forms, amaranth retains adequate content of several [[dietary minerals]].<ref name=usdamrth>{{cite web |title=USDA National Nutrient Database: cooked amaranth grain per 100 grams; Full report |url=https://fdc.nal.usda.gov/fdc-app.html#/food-details/170683/nutrients |date=2014 |access-date=7 October 2019}}</ref>
* It is easy to cook. Boil in water with twice the amount of water as grain by volume (or 2.4 times as much water by weight). Amaranth seed can also be popped one tablespoon at a time in a hot pan without oil, shaken every few seconds to avoid burning.<ref>{{cite web |url=https://www.youtube.com/watch?v=eOwOZxHmwCU |title=How to puff amaranth | archive-url=https://ghostarchive.org/varchive/youtube/20211122/eOwOZxHmwCU| archive-date=2021-11-22 | url-status=live |website=YouTube |date=28 November 2017 |publisher=Green Healthy Cooking |access-date=September 20, 2020}}{{cbignore}}</ref>
* It grows fast and, in three cultivated species, the large seedheads can weigh up to 1&nbsp;kg and contain a half-million small seeds.<ref name="Tucker 1986" />

In the United States, the amaranth crop is mostly used for seed production. Most amaranth in American food products starts as a ground flour, blended with wheat or other flours to create cereals, crackers, cookies, bread or other baked products. Despite utilization studies showing that amaranth can be blended with other flours at levels above 50% without affecting functional properties or taste, most commercial products use amaranth only as a minor portion of their ingredients despite them being marketed as "amaranth" products.<ref>{{Cite web |url=https://www.extension.iastate.edu/alternativeag/cropproduction/amaranth.html |title=Amaranth: Alternative Agriculture |last=Delate |first=Kathleen |publisher=Iowa State University |date=2013}}</ref>
<!--original research === Seed flour ===

Amaranth seed flour has been evaluated as an additive to wheat flour by food specialists. To determine palatability, different levels of amaranth grain flour were mixed with the wheat flour and baking ingredients (1% salt, 2.5% fat, 1.5% yeast, 10% sugar, and 52–74% water), fermented, molded, pan-proofed, and baked. The baked products were evaluated for loaf volume, moisture content, color, odor, taste, and texture. The amaranth-containing products were then compared with bread made from 100% wheat flour. The loaf volume decreased by 40% and the moisture content increased from 22 to 42% with increase in amaranth grain flour. The study found that the sensory scores of the taste, odor, color, and texture decreased with increasing amounts of amaranth. Generally, above 15% amaranth grain flour, significant differences occurred in the evaluated sensory qualities and the high amaranth-containing product was found to be of unacceptable palatability to the population sample that evaluated the baked products.<ref>{{cite journal |title=The effect of amaranth grain flour on the quality of bread |author=Jerome Ayo |doi=10.1081/JFP-100105198 |journal=International Journal of Food Properties |year=2001 |volume=4 |issue=2 |pages=341 |url=http://www.tandfonline.com/doi/abs/10.1081/JFP-100105198}}</ref>
 -->

=== Leaves, roots, and stems ===
[[File:Travancore Cheera Thoran.JPG|thumb|Southern Kerala-style traditional [[Thoran]] made with ''Cheera'' (amaranth) leaves]]

Amaranth species are cultivated and consumed as a [[leaf vegetable]] in many parts of the world. Four species of ''Amaranthus'' are documented as cultivated vegetables in eastern Asia: ''[[Amaranthus cruentus]]'', ''[[Amaranthus blitum]], [[Amaranthus dubius]]'', and ''[[Amaranthus tricolor]]''.<ref>Costea (2003). Notes on Economic Plants. ''Economic Botany'' 57(4): 646-649</ref>

==== Asia ====
In Indonesia and Malaysia, leaf amaranth is called {{lang|ms|bayam}} (although the word has since been loaned to refer to [[spinach]], in a different genus<ref>{{cite encyclopedia |url=http://prpm.dbp.gov.my/Search.aspx?k=spinach |dictionary=Kamus Inggeris-Melayu Dewan |title=spinach |year=2017 |publisher=Dewan Bahasa dan Pustaka}}</ref>). In the Philippines, the [[Ilocano language|Ilocano]] word for the plant is {{lang|ilo|kalunay}}; the [[Tagalog language|Tagalog]] word for the plant is {{lang|tg|kilitis}} or {{lang|tg|kulitis}}.

In [[Uttar Pradesh]] and [[Bihar]] in India, it is called {{lang|hi-Latn|chaulai}} and is a popular red leafy vegetable (referred to in the class of vegetable preparations called {{lang|hi-Latn|laal [[saag]]}}). It is called ''chua'' in Kumaun area of Uttarakhand, where it is a popular red-green vegetable. In [[Karnataka]] in India, it is called {{lang|kn-Latn|harive soppu}} ({{lang|kn|ಹರಿವೆ ಸೊಪ್ಪು}}). It is used to prepare curries such as ''hulee, palya, majjigay-hulee'', and so on. In Kerala, it is called ''cheera'' and is consumed by stir-frying the leaves with spices and red chili peppers to make a dish called ''cheera [[thoran]]''. In Tamil Nadu, it is called {{lang|ta-Latn|mulaikkira}} and is regularly consumed as a favourite dish, where the greens are steamed and mashed with light seasoning of salt, red chili pepper, and cumin. It is called {{lang|ta-Latn|keerai masial}}. In the states of Andhra Pradesh and Telangana and other Telugu speaking regions of the country, this leaf is called as "''Thotakura''" and is cooked as a standalone curry, added as a part of mix leafy vegetable curry or added in preparation of a popular ''[[dal]]'' called {{lang|te-Latn|thotakura pappu}} ({{lang|te|తోటకూర పప్పు}}) in ([[Telugu language|Telugu]]). In Maharashtra, it is called {{lang|mr-Latn|shravani maath}} and is available in both red and white colour. In Orissa, it is called {{lang|or-Latn|khada saga}}, it is used to prepare {{lang|or-Latn|saga bhaja}}, in which the leaf is fried with chili and onions. In [[West Bengal]], the green variant is called {{lang|bn-Latn|Notey Shaak}} ({{lang|bn|নটে শাক}}) and the red variant is called {{lang|bn-Latn|Laal Shaak}} ({{lang|bn|লাল শাক }}).

In China, the leaves and stems are used as a stir-fry vegetable, or in soups. In Vietnam, it is called {{lang|vi|rau dền}} and is used to make [[soup]]. Two species are popular as edible vegetable in Vietnam: {{lang|vi|dền đỏ}} (''Amaranthus tricolor'') and {{lang|vi|dền cơm}} or {{lang|vi|dền trắng}} (''Amaranthus viridis'').

==== Africa ====
A traditional food plant in Africa, amaranth has the potential to improve nutrition, boost [[food security]], foster rural development and support sustainable land care.<ref>{{cite book |author=National Research Council |title=Lost Crops of Africa: Volume II: Vegetables |url=http://books.nap.edu/openbook.php?record_id=11763 |access-date=2008-07-15 |volume=2 |date=2006-10-27 |publisher=National Academies Press |isbn=978-0-309-10333-6 |oclc=34344933 |doi=10.17226/11763 |chapter=Amaranth |chapter-url=http://books.nap.edu/openbook.php?record_id=11763&page=35}}</ref>

In Bantu regions of Uganda and western Kenya, it is known as ''doodo'' or ''litoto''.<ref>{{cite book |author=Goode, P. M. |title=Edible plants of Uganda |publisher=Food and Agriculture Organization of the United Nations |year=1989 |isbn=9789251027134 |pages=25–6}}</ref> It is also known among the [[Kalenjin people|Kalenjin]] as a [[drought]] crop (''chepkerta''). In [[Lingala language|Lingala]] (spoken in the Congo), it is known as {{lang|ln|lɛngalɛnga}} or {{lang|ln|bítɛkutɛku}}.<ref>{{cite journal |author=Enama, M. |year=1994 |title=Culture: The missing nexus in ecological economics perspective |journal=Ecological Economics |issue=2 |pages=93–95 |doi=10.1016/0921-8009(94)00010-7 |volume=10|bibcode=1994EcoEc..10...93E }}</ref> In Nigeria, it is a common vegetable and goes with all Nigerian starch dishes. It is known in [[Yoruba language|Yoruba]] as {{lang|yo|shoko}}, a short form of {{lang|yo|shokoyokoto}} (meaning "make the husband fat"), or {{lang|yo|arowo jeja}} (meaning "we have money left over for fish"). In Botswana, it is referred to as ''morug'' and cooked as a staple green vegetable.

==== Europe ====
In Greece, purple amaranth (''[[Amaranthus blitum]]'') is a popular dish called {{lang|el|βλήτα}}, {{lang|el-Latn|vlita}} or {{lang|el-Latn|vleeta}}. It is boiled, then served with olive oil and lemon juice like a salad, sometimes alongside fried fish. Greeks stop harvesting the plant (which also grows wild) when it starts to bloom at the end of August.

==== Americas ====
In Brazil, green amaranth was, and to a degree still is, often considered an invasive species as all other species of amaranth (except the generally imported ''A. caudatus'' cultivar), though some have traditionally appreciated it as a leaf vegetable, under the names of {{lang|pt|caruru}} or {{lang|pt|bredo}}, which is consumed cooked, generally accompanying the staple food, [[rice and beans]].

In the Caribbean, the leaves are called ''bhaji'' in Trinidad and ''callaloo'' in Jamaica, and are sautéed with onions, garlic, and tomatoes, or sometimes used in a soup called pepperpot soup.

===Oil===
Making up about 5% of the total [[fatty acid]]s of amaranth, [[squalene]]<ref name="HeCai2002">{{cite journal |last1=He |first1=Han-Ping |last2=Cai |first2=Yizhong |last3=Sun |first3=Mei |last4=Corke |first4=Harold |title=Extraction and Purification of Squalene from ''Amaranthus'' Grain |journal=Journal of Agricultural and Food Chemistry |volume=50 |issue=2 |year=2002 |pages=368–372 |issn=0021-8561 |doi=10.1021/jf010918p |pmid=11782209}}</ref> is extracted as a vegetable-based alternative to the more expensive [[shark oil]] for use in [[dietary supplements]] and [[cosmetics]].<ref>{{Cite web |url=http://www.prnewswire.com/news-releases/squalene-market-size-to-exceed-usd-240-million-by-2022-global-market-insights-inc-577232031.html |title=Squalene Market Size to Exceed USD 240 Million by 2022 |publisher=Global Market Insights Inc. |date=27 April 2016 |access-date=14 December 2016}}</ref>

=== Dyes ===
The flowers of the 'Hopi Red Dye' amaranth were used by the [[Hopi]] (a tribe in the western United States) as the source of a deep red [[natural dye|dye]]. Also a synthetic dye was named "[[Amaranth (dye)|amaranth]]" for its similarity in color to the natural amaranth [[pigment]]s known as [[betalain]]s. This synthetic dye is also known as Red No. 2 in North America and E123 in the European Union.<ref>"The following color additives are not authorized for use in food products in the United States: (1) Amaranth (C.I. 16185, EEC No. E123, formerly certifiable as FD&C red No. 2);" [http://www.cfsan.fda.gov/~comm/cp03803.html FDA/CFSAN Food Compliance Program: Domestic Food Safety Program] {{webarchive |url=https://web.archive.org/web/20070929110929/http://www.cfsan.fda.gov/~comm/cp03803.html |date=2007-09-29 }}</ref>

=== Ornamentals ===
[[File:Amaranthus flowers.jpg|thumb|''A. hypochondriacus'' (prince's feather) flowering]]

The genus also contains several well-known ornamental plants, such as ''Amaranthus caudatus'' (love-lies-bleeding), a vigorous, [[hardiness (plants)|hardy]] annual with dark purplish [[flower]]s crowded in handsome drooping spikes. Another Indian annual, ''A.&nbsp;hypochondriacus'' (prince's feather), has deeply veined, lance-shaped leaves, purple on the under face, and deep crimson flowers densely packed on erect spikes.

Amaranths are recorded as food plants for some [[Lepidoptera]] ([[butterfly]] and [[moth]]) species including the [[Nutmeg (moth)|nutmeg moth]] and various case-bearer moths of the genus ''[[Coleophora]]'': ''C.&nbsp;amaranthella'', ''C.&nbsp;enchorda'' (feeds exclusively on ''Amaranthus''), ''C.&nbsp;immortalis'' (feeds exclusively on ''Amaranthus''), ''C.&nbsp;lineapulvella'', and ''C.&nbsp;versurella'' (recorded on ''A.&nbsp;spinosus'').

== Culture ==
[[Diego Durán]] described the festivities for the Aztec god {{lang|nci|[[Huitzilopochtli]]|italic=no}}. The Aztec month of {{lang|nci|[[Aztec calendar|Panquetzaliztli]]|italic=no}} (7 December to 26 December) was dedicated to {{lang|nci|Huitzilopochtli|italic=no}}. People decorated their homes and trees with paper flags; ritual races, processions, dances, songs, prayers, and finally [[human sacrifice]]s were held. This was one of the more important Aztec festivals, and the people prepared for the whole month. They fasted or ate very little; a statue of the god was made out of amaranth seeds and honey, and at the end of the month, it was cut into small pieces so everybody could eat a piece of the god. After the Spanish conquest, cultivation of amaranth was outlawed, while some of the festivities were subsumed into the Christmas celebration.

Amaranth is associated with longevity and, poetically, with death and immortality.<ref name="guilherme2022">{{Cite journal |last=Nabais Freitas |first=Guilherme |date=2022-02-25 |title=Anti-Spenserian Amaranth In Milton's Lycidas |url=https://academic.oup.com/nq/article/69/1/28/6517961 |journal=Notes and Queries |language=en |volume=69 |issue=1 |pages=28–31 |doi=10.1093/notesj/gjac007 |issn=0029-3970}}</ref> Amaranth garlands were used in the mourning of [[Achilles]].<ref name="guilherme2022" /><ref>{{Cite journal |last=Allen |first=D. C. |date=1957 |title=Milton's Amarant |url=https://www.jstor.org/stable/3043098 |journal=Modern Language Notes |volume=72 |issue=4 |pages=256–258 |doi=10.2307/3043098 |jstor=3043098 |issn=0149-6611 |quote=The ''amaranthus'' was known to antiquity as an unfading flower, and it was used as a garland in the veneration of the wraith of Achilles}}</ref>

[[John Milton]]'s ''[[Paradise Lost]]'' portrays a showy amaranth in the [[Garden of Eden]], "remov'd from Heav'n" when it blossoms because the flowers "shade the fountain of life".<ref>{{Cite book |last=Milton |first=John |title=Paradise Lost |date=2000 |publisher=Penguin Books |oclc=647024119}}</ref> He describes amaranth as "immortal" in reference to the flowers that generally do not wither and retain bright reddish tones of color, even when deceased; referred to in one species as "[[Amaranthus caudatus|love-lies-bleeding]]."

==Gallery==
<gallery widths=180>
Amaranthus caudatus1.jpg|Love-lies-bleeding (''[[Amaranthus caudatus|A.&nbsp;caudatus]]'')
Amaranthus.hybridus1web.jpg|Green amaranth (''A. hybridus'')
Amaranth2.jpg|[[Amaranthus pumilus|Seabeach amaranth]] (''A.&nbsp;pumilus''), an amaranth on the Federal [[Threatened species]] List
Illustration Amaranthus retroflexus0.jpg|Red-root amaranth (''A. retroflexus'')—from Thomé, ''Flora von Deutschland, Österreich und der Schweiz'' 1885
Amaranthus.spinosus1web.jpg|Spiny amaranth (''[[Amaranthus spinosus|A.&nbsp;spinosus]]'')
Amaranthus.viridis1web.jpg|Green amaranth (''[[Amaranthus viridis|A.&nbsp;viridis]]'')
Amaranth sp 2.jpg| Popping amaranth (''Amaranthus sp.'')
Fepm (8).jpg|Amaranth from [[Chilpancingo]]
</gallery>

==See also==
* [[Ancient grains]]

==References==
{{Reflist}}

==Further reading==
* Howard, Brian Clark. "[https://web.archive.org/web/20140808071935/http://news.nationalgeographic.com/news/2013/08/130812-amaranth-oaxaca-mexico-obesity-puente-food/?google_editors_picks=true Amaranth: Another Ancient Wonder Food, But Who Will Eat It?]". [[National Geographic Society|National Geographic]] Online, August 12, 2013.
* Fanton M., Fanton J. ''Amaranth'' The Seed Savers' Handbook. (1993)
* Assad, R., Reshi, Z. A., Jan, S., & Rashid, I. (2017). Biology of amaranths. The Botanical Review, 83(4), 382–436.

==External links==
{{Commons category|Amaranthus}}
{{unimelb|Amaranthus.html}}
* [https://web.archive.org/web/20131104004544/http://www.cropsforthefuture.org/crop-of-the-week-archive/grain-amaranth-amaranthus-spp-amaranthaceae/ Grain amaranth, Crops For A Future]

{{Cereals}}
{{Taxonbar|from=Q156344}}
{{Authority control}}

[[Category:Amaranthus| ]]
[[Category:Leaf vegetables]]
[[Category:Tropical agriculture]]
[[Category:Asian vegetables]]
[[Category:Pseudocereals]]
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[[Category:Plants used in Native American cuisine]]