Oenothera L.
  • Sp. Pl. 1: 346. 1753. (1 May 1753)


Cite taxon page as 'WFO (2021): Oenothera L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000026653. Accessed on: 21 Sep 2021'

General Information

Annual, biennial or perennial herbs, caulescent or acaulescent, with a taproot or fibrous roots, occasionally with rhizomes or shoots arising from spreading lateral roots. Leaves alternate or in a basal rosette that often is absent in mature plants, entire, toothed to pinnatifid; stipules absent. Flowers perfect, actinomorphic, in axils of upper leaves, when numerous forming terminal leafy spikes, racemes, or corymbs, opening near sunset or near sunrise. Floral tube usually well developed, cylindric and somewhat flared near mouth, deciduous soon after anthesis. Sepals 4, green or yellowish, often tinged or striped red or purple. Petals 4, yellow, purple, pink, or white. Stamens 8; anthers versatile; pollen shed singly. Ovary with 4 locules; ovules numerous; stigma divided into 4 linear lobes, receptive all around, and subtended by a ± conspicuous ringlike indusium in early development, but often obscured when receptive. Fruit a dehiscent capsule [rarely indehiscent outside of China], straight or curved, terete to 4-angled or winged, sessile, occasionally pedicellate, or basal portion sterile and stipelike. Seeds numerous, in 1 or 2(or 3) rows or in clusters in each of 4 locules. 2n = 14, 28, 42, 56.

  • Provided by: [D].Flora Of CHina @ efloras.org
    • Source: [
    • 4
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    6. Oenothera L.

    Gaura L., Onagra Mill.

    Por W.L. Wagner.

    Hierbas anuales, bianuales o perennes, caulescentes o acaules, algunas veces sufruticosas; tallos erectos, ascendentes u ocasionalmente decumbentes, algunas veces arraigando desde los nudos; raíces axonomorfas o fibrosas, algunas veces con vástagos emergiendo de raíces laterales, rara vez rizomatosas. Hojas basales y/o caulinares, alternas, enteras, dentadas o pinnatífidas, con frecuencia irregularmente pinnatífidas; estípulas ausentes. Inflorescencias en espigas, racimos o corimbos, o las flores en las axilas de las hojas apicales. Flores bisexuales, generalmente actinomorfas, a veces zigomorfas, abriéndose antes al atardecer o amanecer, generalmente marchitándose la mañana siguiente; tubo floral bien desarrollado, generalmente caduco después de la antesis; sépalos 4, reflexos; pétalos (3)4, amarillos, purpúreos o blancos, rara vez rosados, rojos, al envejecer generalmente anaranjados, purpúreos, amarillo claro o blanquecinos, a veces unguiculados; estambres (6)8, subiguales o los de los antipétalos más cortos; anteras versátiles, el tejido esporógeno en cada lóculo no dividido, a veces el tejido esporógeno en cada lóculo dividido por tejido estéril en paquetes discretos; polen expulsado individualmente, los granos conectados entre sí por hilos de viscina; ovario (3-)4-locular, los óvulos numerosos; estigma profundamente dividido en 4 lóbulos lineares. Fruto en cápsula, en general loculicidamente dehiscente, algunas veces tardíamente, rara vez indehiscente y nuciforme, terete a (3-)4-angulado o (3-)4-alado, sésil o la parte basal estéril estipiforme; semillas usualmente numerosas o 1-4(-8), en 1-2(-3) hileras o en aglomerados en cada lóculo. Autoincompatible o autocompatible. x=7. 145 spp. Norteamérica y Sudamérica, algunas especies en Mesoamérica; varias especies ampliamente naturalizadas.

    Bibliografía: Dietrich, W. Ann. Missouri Bot. Gard. 64: 425-626 (1977). Dietrich, W. y Wagner, W.L. Syst. Bot. Monogr. 24: 1-91 (1988). Dietrich, W., Wagner, W.L. y Raven, P.H. Syst. Bot. Monogr. 50: 1-234 (1997). Raven, P.H. y Gregory, D.P. Mem. Torrey Bot. Club 23: 1-96 (1972).

  • Provided by: [E].Flora Mesoamericana
    • Source: [
    • 5
    • ]. 

    Annual to perennial, caulescent or acaulescent herbs, with alternate or basal leaves. Flowers white to yellow or rose, often aging reddish or purplish, solitary in axils or in racemes or spikes. Floral tube prolonged beyond the ovary, quite deciduous. Sepals 4, reflexed in anthesis. Petals 4. Stamens 8, equal, or if unequal the epipetalous shorter; anthers mostly versatile. Stigma varying from having 4 linear lobes, to discoid or capitate. Capsule membranous to woody, straight to curved or coiled, 4-loculed, 4-valved, mostly dehiscent. Seeds many, naked.

  • Provided by: [C].Flora de Panama
    • Source: [
    • 6
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    "Fls 4-merous, solitary in the axils or forming a terminal raceme or spike, commonly vespertine and ephemeral, but matutinal or diurnal and lasting several days in spp. 13–17; hypanthium usually slenderly tubular and prolonged well beyond the ovary (at least 3 mm in all but one of our spp.), deciduous from the fr; sep at first connate, often with terminal or subterminal appendages, splitting at anthesis and reflexed; pet in most of our spp. yellow, in two white or pink, often large and showy; stamens 8, equal or alternately unequal; anthers versatile (sometimes obscurely so in small fls); sporogenous tissue continuous in each microsporangium; ovary 4-locular; ovules numerous; style ± elongate; stigma with 4 slender lobes stigmatic all around; capsule prismatic to terete or winged, linear to ovoid or obovoid, in some spp. deeply sulcate and strongly angled; herbs with alternate, mostly narrow lvs. (Kneiffia, Hartmannia, Lavauxia, Megapterium, Meriolix, Peniophyllum, Raimannia) 80, New World."

  • Provided by: [B].New York Botanical Garden
    • Source: [
    • 7
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    Morphology

    Stipules absent.

  • Provided by: [G].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
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    Flowers borne in the axils of often reduced leaves, often clustered in an inflorescence near the ends of the sterns.

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

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

    Floral tube present.

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

    Sepals 4, caducous.

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

    Petals 4, caducous, yellow, white, or rose-purple, with contorted aestivation.

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

    Seeds lacking hairs.

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

    Stamens 8; anthers attached near the middle.

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

    Ovary 4-locular; ovules in 1-many rows in each locule, the seeds free.

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

    Capsule loculicidal.

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

    Pollen shed singly.

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

    Stigma deeply 4-lobed.

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

    Annual, biennial, or perennial herbs.

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

    Leaves alternate, entire to pinnatifid.

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

    Distribution

    A genus of ca. 200 species mostly of temperate parts of the Americas.

  • Provided by: [C].Flora de Panama
    • Source: [
    • 6
    • ]. 

    Included Species

    Synonyms

     Information From

    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • A 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.
    • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora de Panama
    http://www.tropicos.org/Project/PAC
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • C Missouri Botanical Garden
    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
    Flora Mesoamericana
    http://www.mobot.org/MOBOT/fm/
    Gerrit Davidse, Mario Sousa Sánchez, A. O. Chater, Universidad Nacional Autónoma de México. Instituto de Biología, Missouri Botanical Garden, Natural History Museum (London, England) UNAM, 1994
    • E Missouri Botanical Garden
    Onagraceae
    World Flora Online Data. 2017.
    • F CC0 1.0 Universal (CC0 1.0).
    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
    • G
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • H CC0 1.0 Universal (CC0 1.0).