Ovular Morphology and the Classification of Dicotyledons

  • W. R. Philipson
Part of the Plant Systematics and Evolution / Entwicklungsgeschichte und Systematik der Pflanzen book series (SYSTEMATICS, volume 1)


Four types of ovule are defined by integument number and nucellar thickness. Their distribution throughout the dicotyledons is summarized and their importance in defining major subclasses is advocated. In particular, those families with ovules having a single integument are considered to form a complex of orders and families which includes most sympetalous and several polypetalous groups (including Cornales, Araliales, Escalloniaceae and Pittosporaceae). This complex (provisionally referred to as the Unitegminae) is believed to comprise the modern representative of a distinct evolutionary line within the dicotyledons.


Evolutionary Line Major Taxon Floral Anatomy Satellite Family Distinct Evolutionary Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • W. R. Philipson
    • 1
  1. 1.Department of BotanyUniversity of CanterburyChristchurchNew Zealand

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