Fagopyrum Mill.
  • Gard. Dict. Abr. (ed. 4) vol. 1. 1754.
  • Buckwheat, sarrasin [Latin fagus, beech, and Greek pyrus, wheat, alluding to resemblance of the achene to a beech-nut]


Cite taxon page as 'WFO (2021): Fagopyrum Mill. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000014554. Accessed on: 18 Oct 2021'

General Information

Herbs, annual; taprooted. Stems erect or ascending, glabrous or puberulent. Leaves deciduous, cauline, alternate, petiolate (proximal leaves) or sessile (distal leaves); ocrea persistent or deciduous, chartaceous; petiole base articulated; blade cordate, triangular, hastate, or sagittate, margins entire to sinuate. Pedicels present. Inflorescences axillary, or terminal and axillary, racemelike or paniclelike, pedunculate. Flowers bisexual or, rarely, bisexual and staminate on same plant, 2-6 per ocreate fascicle, heterostylous or homostylous, base stipelike; perianth nonaccrescent, white, pale pink, or green, broadly campanulate, glabrous; tepals 5, distinct, petaloid, dimorphic, outer smaller than inner; stamens 8; filaments distinct, free, glabrous; anthers white, pink, or red, oval to elliptic; styles 3, reflexed, distinct; stigmas capitate. Achenes strongly exserted, brown to dark brown or gray, sometimes mottled black, unwinged or essentially so, bluntly to sharply 3-gonous, glabrous. Seeds: embryo folded. x = 8.

  • Provided by: [B].Flora of North America @ efloras.org
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    Herbs annual or perennial, rarely subshrubs, monoecious. Stems erect, glabrous or pubescent. Leaves simple, alternate, petiolate; leaf blade triangular, cordate, broadly ovate, sagittate, or linear; ocrea membranous, oblique, margin entire, apex acute or truncate. Inflorescence racemose or corymbose. Flowers bisexual. Perianth persistent, 5-parted; tepals 5, not accrescent. Stamens 8. Styles 3, elongate; stigmas capitate. Achenes trigonous, not winged or horned at base.

  • Provided by: [D].Flora Of CHina @ efloras.org
    • Source: [
    • 5
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    "Fls perfect; tep 5, petaloid, unequal in width, connate toward the base; stamens 8; ovary 3-angled; styles 3, with capitellate stigma; fr a trigonous achene, much exceeding the persistent but scarcely enlarged cal; embryo within the endosperm, with broad, often folded cotyledons; annual herbs with alternate, petiolate, broadly triangular lvs and obliquely truncate ocreae; fls white or pink, pediceled in fascicles disposed in racemes arising from the axils of short bracts. 15, temp Eurasia."

  • Provided by: [E].New York Botanical Garden
    • Source: [
    • 6
    • ]. 

    Morphology

    Nut much exceeding the perianth, triquetrous with sharp angles and elsewhere sometimes with barbed bristles.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
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    Annual or perennial herbs.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
    • ]. 

    Stamens 7–8, alternating with yellow nectaries on the disk.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
    • ]. 

    Stem erect, glabrous or hairy, hollow.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
    • ]. 

    Styles 3, filiform; stigmas capitate.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
    • ]. 

    Leaves alternate, petiolate.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
    • ]. 

    Perianth 5-merous, campanulate; segments almost free, subequal, with a main vein and 2 collateral veins arising near the base.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
    • ]. 

    Ocrea short, obliquely truncate, entire.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
    • ]. 

    Flowers hermaphrodite, heterostylous, in shortly pedunculate bracteate clusters, arranged in terminal and axillary raceme-like panicles.

  • Provided by: [A].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
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    Herbes'annuelles.'Feuilles'alternes, pétiolées, cordées à la base, à ochréa membraneuse, tronquée et à bords non ciliés.'Inflorescences'en racèmes spiciformes axillaires et terminaux composés de fascicules cymeux situés à l'aisselle de bractées ochréiformes.'Fleurs'☿ et hétérodistylées, pédicellées et à pédicelle muni de 2 bractéoles membraneuses et soudées en gaine; périgone à 5 tépales persistants; étamines 8, alternant avec 8 nectaires; ovaire inclus dans le périgone, trigone, à 3 styles filiformes et à stigmates capités.'Akènes dépassant longuement le périgone fructifère, trigones, à albumen uni.\n\t\t\t\tGenre boréal, à 2 espèces originaires de l'Asie centrale, introduites et cultivées dans la plupart des régions tempérées du globe.

  • Provided by: [C].Flore d'Afrique Centrale
    • Source: [
    • 8
    • ]. 

    Literature

    SELECTED REFERENCES

    Ohnishi, O. 1998. Search for the wild ancestor of buckwheat III. The wild ancestor of cultivated common buckwheat, and of Tartary buckwheat. Econ. Bot. 52: 123-133. Ohnishi, O. and Y. Matsuoka. 1996. Search for the wild ancestor of buckwheat II. Taxonomy of Fagopyrum (Polygonaceae) species based on morphology, isozymes and cpDNA variability. Genes Genet. Systems 71: 383-390. Ohsako, T. and O. Ohnishi. 2000. Intra- and interspecific phylogeny of wild Fagopyrum (Polygonaceae) species based on nucleotide sequences of noncoding regions of chloroplast DNA. Amer. J. Bot. 87: 573-582. Yasui, Y. and O. Ohnishi. 1998. Phylogenetic relationships among Fagopyrum species revealed by the nucleotide sequences of the ITS region of the nuclear rRNA gene. Genes Genet. Systems 73: 201-210. Yasui, Y. and O. Ohnishi. 1998b. Interspecific relationships in Fagopyrum (Polygonaceae) revealed by the nucleotide sequences of the rbcL and accD genes and their intergenic region. Amer. J. Bot. 85: 1134-1142.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 4
    • ]. 

    Other Local Names

    NameLanguageCountry
    Buckwheat, sarrasin [Latin fagus, beech, and Greek pyrus, wheat, alluding to resemblance of the achene to a beech-nut]

     Information From

    Plants Of the World Online Portal - FZ
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    Flora of North America @ efloras.org
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    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    Flore d'Afrique Centrale
    https://www.floredafriquecentrale.be
    • C http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International (CC BY 4.0)
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • D Missouri Botanical Garden
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • E Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Polygonaceae
    World Flora Online Data. 2017.
    • F CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • G CC0 1.0 Universal (CC0 1.0).