Amaranthus cruentus L.
  • Syst. Nat. ed. 10
  • Blutroter Bastard-Amarant

Cite taxon page as 'WFO (2021): Amaranthus cruentus L. Published on the Internet; Accessed on: 26 Oct 2021'

General Information

Stem erect, green, glabrous. Petiole green; leaf blade rhombic-ovate or oblong-lanceolate, glabrous, base cuneate, margin entire or undulate, apex acuminate or acute. Complex thyrsoid structures erect; bracts and tepals distinctly long pointed at apex; bracts of female flowers ca. 1.5 × as long as segments; tepals conspicuously shorter than fruit. Utricles 3-4 mm in diam., circumscissile. Seeds subglobose. Fl. Jun-Jul, fr. Sep-Oct. 2n = 30*, 32*, 34*.

  • Provided by: [D].Flora Of CHina @
    • Source: [
    • 2
    • ]. 

    Plants almost glabrous or slightly pubescent distally, especially when young. Stems erect, green or reddish purple, branched distally, mostly in inflorescence, to nearly simple, 0.4-2 m. Leaves: petiole 1/2 as long as to ± equaling blade; blade rhombic-ovate or ovate to broadly lanceolate, 3-15(-20) × 1.5-10(-15) cm, occasionally larger in robust plants, base cuneate to broadly cuneate, margins entire, plane, apex acute or subobtuse to slightly emarginate, with mucro. Inflorescences terminal and axillary, erect, reflexed, or nodding, usually dark red, purple, or deep beet-red, less commonly almost green or greenish red, leafless at least distally , large and robust. Bracts narrowly spathulate, 2-3 mm, equaling or slightly longer than tepals, apex short-spinescent. Pistillate flowers: tepals 5, oblong to lanceolate, not clawed, equal or subequal, 1.5-3 mm, apex acute; style branches erect or slightly reflexed; stigmas 3. Staminate flowers at tips of inflorescences; tepals 5; stamens (4-)5. Utricles obovoid to elongate-obovoid, 2-2.5 mm, smooth or slightly rugose distally, dehiscence regularly circumscissile. Seeds usually white or ivory, with reddish or yellowish tint, sometimes dark brown to dark reddish brown, broadly lenticular to elliptic-lenticular, 1.2-1.6 mm diam., smooth or indistinctly punctate.

  • Provided by: [H].Flora of North America @
    • Source: [
    • 3
    • ]. 

    Coarse usually pubescent annuals to 2 m. high, simple or with ascending branches. Leaves glabrous above, pubescent or glabrate below, entire to minutely crenulate, ovate to rhombic, apically rounded to acute and mucronate, basally acute to cuneate, 3-15 cm. long, 1-6 cm. broad; petioles 1-8 cm. long. Inflores- cences of thyrses racemosely disposed, the terminal and axillary thyrses cylindric, often drooping, 5-15 mm. broad. Flowers polygamo-monoecious or monoecious; bracts and bracteoles subequal, lanceolate to ovate, 1.5-2.5 mm. long; sepals 5, oblong to ovate, rounded to mucronate apically, 1.5-2 mm. long, the midribs dark green, the margins scariose and tinted with anthocyanins; stamens 5, discrete, 1-2 mm. long; ovary compressed globose, capped by a circular stylopodium; stigmata 3 (-4), longer than the stylopodium. Fruit a smooth to rugulose subglobose utricle, circumscissile near the middle, about 2 mm. long, usually exceeding the sepals; seeds cochleate-orbiculate, dark reddish brown to black, minutely reticulate, 1-1.3 mm. broad.

  • Provided by: [F].Flora de Panama
    • Source: [
    • 4
    • ]. 

    "Cultigen apparently derived from A. hybridus; infl large and showy, mostly bright red in life, lax, at least the terminal thyrse generally nodding or drooping; bract of the pistillate fls with slender midrib, not surpassing the fr; sep 5, straight, unequal, the shorter (inner) ones less than 2 mm, oblong, acutish, ca half as long as the fr; style-branches erect; seeds in ornamental forms dark brown; 2n=32, 34. Originally cult. for grain and dyestuff, now relictual as a grain-plant, but widely cult. as an ornamental and pot- herb, and occasionally escaping or persistent, but scarcely established in our range. (A. hybridus ssp. c.)"

  • Provided by: [E].New York Botanical Garden
    • Source: [
    • 5
    • ]. 


    Blütenstand meist rot, selten gelbbraun. Vorblätter der weiblichen Blüten 2–3 mm lang, kurz begrannt, die längeren 1–1,5mal so lang wie die Perigonblätter. Frucht eine sich öffnende Deckelkapsel.

  • Provided by: [G].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 6
    • ]. 


    This is the commonly cultivated grain amaranth of Central America.

  • Provided by: [F].Flora de Panama
    • Source: [
    • 4
    • ]. 

    Distribution Map

    • Introduced distribution
    Introduced into
    • Southern America Brazil Paraába
    • Rio Grande do Sul
    • Santa Catarina
    • Minas Gerais
    • São Paulo

    Other Local Names

    Blutroter Bastard-AmarantGermanCH
    Amarante sanglanteFrenchCH
    caruru-vermelho, veludoPortuguese
    abanico chino calalu
    Blood amaranth, purple amaranth, caterpillar amaranth


     Information From

    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    MBG Floras Images
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • B Missouri Botanical Garden
    Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    Brazil Flora G (2014): Brazilian Flora 2020 project - Projeto Flora do Brasil 2020. v393.147. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro. Dataset/Checklist. doi:10.15468/1mtkaw
    • C Group Brazil Flora, REFLORA Program
    Flora Of CHina @
    'Flora of China @ eFloras (2008). Published on the Internet [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
    Flora de Panama
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • F Missouri Botanical Garden
    Flora Helvetica – Illustrierte Flora der Schweiz
    Flora Helvetica – Illustrierte Flora der Schweiz, Konrad Lauber, Gerhart Wagner, Andreas Gygax. Haupt Verlag 2018.
    • G All Rights Reserved
    Flora of North America @
    'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • H Flora of North America Association
    World Flora Online consortium
    World Flora Online Data. 2018.
    • I CC0 1.0 Universal (CC0 1.0).