Tetragonia L.
  • Sp. Pl. 1: 480. 1753. (1 May 1753)
  • New Zealand spinach [Greek tetra, four, and gonia, angle, in reference to the shape of the fruit]


Cite taxon page as 'WFO (2019): Tetragonia L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000037907. Accessed on: 18 Nov 2019'

General Information

Herbs to shrubs, annual to perennial, rarely dioecious or monoecious, with shiny white bladder cells and sometimes hairs. Stems erect, ascending, or prostrate. Leaves mostly alternate, flat, folded, or with margin rolled downward, fleshy, entire or slightly undulate, not stipulate. Inflorescences of solitary flowers or cymes often resembling fascicles. Flowers bisexual or unisexual, sessile or pedicellate, perigone lobes (3 or)4(-7), inside yellow or green, basally united into a short tube, nut base often angled. Stamens 4 or more, fused basally with perigone tube. Ovary inferior, 2-8-loculed, each locule with one pendulous ovule. Stigmas as many as locules. Fruit a nut, perigone persistent, base turbinate or obovoid, angled or winged, mostly with 4 rows of ornaments, often apically as horns. Seeds subreniform or pear-shaped.

  • Provided by: [F].Flora Of CHina @ efloras.org
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    Herbs [subshrubs], annual or perennial, succulent, glabrous, pilose, or papillate. Roots fibrous. Stems prostrate [subscandent], semiwoody at base. Leaves cauline, alternate, usually petioled; stipules absent; blade flat, margins entire to slightly sinuate or shallowly lobed. Inflorescences: axillary clusters of 2-3 flowers or flowers solitary, sessile or peduncled; bracts absent. Flowers bisexual or unisexual, inconspicuous, 5[-10] mm diam.; calyx campanulate, adnate to ovary, angled, winged, or horned; calyx lobes [3-]4-5[-7], green or yellow adaxially; petals and petaloid staminodia absent; nectary absent; stamens 1-20, perigynous; pistil 3-10-carpellate; ovary inferior [half inferior], [1-]3-10-loculed; placentation apical; ovule 1 per locule; styles 3-10; stigmas 3-10. Fruits nutlike [drupaceous], angled, indehiscent; horns [2-]4-6[-7]. Seeds 1-10, light brown, ± reniform, arils absent.

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    TETRAGONIA L.

    Tetragonia tetragonoides (Pall.) Kuntze, Revis. Gen. Pl. 2: 264. 1891; Demidovia tetragonoides Pall.; T. expansa Murray.

    Hierbas anuales, menudamente papilosas, glabras, erectas a rastreras, suculentas. Hojas alternas, simples, ovado-rómbicas, 1.7–7.5 (–13) cm de largo y 1–5.2 (–8.5) cm de ancho, ápice obtuso u obtusamente acuminado, base cuneada o decurrente, margen plano o ligeramente undulado; pecíolo6–12 (–25) mm de largo, grueso, estípulas ausentes. Flores solitarias o en fascículos de 2–3, axilares, conpedicelo 2–5 mm de largo; tubo calicino turbinado, formado arriba del ovario, 1.4–2.5 mm de largo en la antesis, los lobos 3–5, usualmente 4, patentes durante la antesis, erectos o conniventes y agrandándose en fruto, desiguales, los 2 laterales ovado-triangulares, 1.7–2.1 mm de largo y 1–1.5 mm de ancho, obtusos, los restantes 1–3 ampliamente ovados o semiorbiculares, 2.2–2.5 mm de largo, 3–3.2 mm de ancho, obtusos o redondeados, con un cornículo corto por debajo de cada lobo, el cornículo agrandado después de la antesis y a veces desarrollándose en una flor o una ramita; completamente amarillentos o verde pálidos internamente; estaminodios ausentes, estambres (4–) 9–12 (–22), insertos en la boca del tubo del cáliz, filamentos solitarios o en fascículos, amarillos, 1–1.5 mm de largo, anteras 0.45 mm de largo y 0.35 mm de ancho; ovario semiínfero, 1.5–2 mm de largo y de ancho, 5–8-locular, óvulo solitario en cada lóculo, placentación apical-axial, estilos 5–8, 1.5–2 mm de largo. Fruto una nuececilla con un endocarpo casi leñoso y epicarpo herbáceo a carnoso, turbinado, 9–12.5 mm de largo y ca 7 mm de ancho; semillas 5–8, reniformes.

    Cultivada; ca 100 m; fl dic; Stevens 23515; nativa de las áreas costeras de Australia, Tasmania, Nueva Zelanda, Japón y las islas del Pacífico, cultivada y ocasionalmente naturalizada en las regiones cálidas de América. Se cocina como verdura en lugar de Spinacia oleracea L. (Chenopodiaceae) en los países tropicales. Un género con 50–60 especies en áreas tropicales y templadas del hemisferio Sur. "Espinaca".

    C.M. Taylor. Revision of Tetragonia (Aizoaceae) in South America. Syst. Bot. 19: 575–589. 1994.

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    Morphology

    Leaves alternate, entire, subsucculent

  • Provided by: [B].Plants Of the World Online Portal - FTEA
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    Stipules absent

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    There is much to be said for treating this and the following genus as members of a separate family, the Tetragoniaceae, more closely allied to the Nyctaginaceae and Gyrostemonaceae; see Friedrich in Phyton 6: 220–263 (1956).

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    Often minutely papillose annual or perennial herbs or subshrubs

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    Calyx gamosepalous, the tube produced above the ovary, 3–5-lobed

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    Flowers axillary, solitary or fasciculate, sessile or pedunculate, hermaphrodite or unisexual, greenish or yellowish

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    Ovary semi-inferior or inferior, 1–9-locular; ovules 1 perloculus, pendulous; styles as many as the loculi, linear, free

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    Stamens few to many, alternate with the calyx-lobes, solitary or fasciculate

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    Fruit simple, dry, hard, indehiscent, terete, winged, ridged, horned or spiny

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    Stamens 3–?, alternate with the perianth-segments, solitary or fasciculate.

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    Perianth-segments united, the tube produced above the ovary, 3–5-lobed.

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    Fruit hard, winged, horned or spiny.

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    Ovary semi-inferior or inferior, (l)2–8(9)-locular, with 1 pendulous ovule per loculus and as many styles as the loculi, linear and free.

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    Flowers axillary, solitary or fasciculate, subsessile or pedunculate, greenish or yellowish.

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    Leaves subsucculent.

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    Annual or perennial herbs or subshrubs, often minutely papillose.

  • Provided by: [C].Plants Of the World Online Portal - FZ
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    Distribution

    Probably some 60 species, of which about 40 are South African, the rest mostly Australasian and in western South America; 2 or 3 species in Somaliland and Socotra

  • Provided by: [B].Plants Of the World Online Portal - FTEA
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    Other Local Names

    NameLanguageCountry
    New Zealand spinach [Greek tetra, four, and gonia, angle, in reference to the shape of the fruit]

     Information From

    Aizoaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • B
    Plants Of the World Online Portal - FZ
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • C
    Flora de Nicaragua
    http://www.tropicos.org/projectwebportal.aspx?projectid=7&pagename=Home&langid=66
    WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
    • D Missouri Botanical Garden
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    '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.
    • E Flora of North America Association
    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.
    • F Missouri Botanical Garden
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • G CC0 1.0 Universal (CC0 1.0).