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  • Reophyte

    Plant adapted to fast-flowing water.  

  • Reniform

    Reniform

    Kidney-shaped in outline. Bean-shaped, with the attachment in the indentation, the width greater than the extent, the apex rounded.  

  • Remote-tubular

    Germination type in which the shoot apex is carried out of the seed in the elongated sheath of the cotyledon (specialist term used in Palmae).  

  • Remote-ligular

    Germination type in which the shoot apex is carried out of the seed in the elongated ligule of the cotyledon (specialist term used in Palmae.  

  • Relict species

    Species which were formerly widespread but now occupy only small areas.  

  • Relict distribution

    Distribution restricted but formerly much more widespread.  

  • Relic

    Remnant.  

  • Rejiciendum nomen

    Name or epithet that has been rejected by a decision of an official committee under the International Code of Botanical Nomenclature.  

  • Rein

    (In palms) a narrow marginal strip on a pinnate leaf that is usually shed when the leaf unfolds.    

  • Regular

    Radially symmetrical, actinomorphic. When the parts are all similar. Flowers that are radially symmetrical. Describes a flower with petals or sepals all of equal size and shape; radially symmetrical. Taking place again and again after the same period of time. Happening at the same time each day.  

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