Plant Systematics and Evolution

, Volume 141, Issue 3–4, pp 299–311 | Cite as

The sporoderm ultrastructure inPersea, Nectandra, Hernandia, Gomortega and some other Lauralean genera

  • Michael Hesse
  • Klaus Kubitzki


The sporoderm ultrastructure of some genera in theLauraceae, Hernandiaceae andGomortegaceae (Laurales) was re-investigated. This and a comparison with some Zingiberalean genera (Canna, Heliconia, Strelitzia) leads to a re-interpretation of the peculiar pollen wall structure of the Lauralean families recently described in this journal (Kubitzki 1981). Their pollen is now interpreted as being nearly exine-less: The (sporopollenin-containing) exine consists only of a thin, skin-like, coherent layer ornamented with spines and globules. The (cellulosic) intine is composed of an unstratified inner and a thick, channelled outer layer. The striking similarity of the pollen ultrastructure between theLaurales studied and some members of theZingiberales can be interpreted as an example of convergent evolution in angiosperm pollen walls.

Key words

Laurales Persea Nectandra Hernandia Gomortega Pollen morphology sporoderm exine intine convergent evolution 


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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • Michael Hesse
    • 1
  • Klaus Kubitzki
    • 2
  1. 1.Institut für Botanik und Botanischer GartenUniversität WienWienÖsterreich
  2. 2.Institut für Allgemeine Botanik und Botanischer GartenUniversität HamburgHamburg 52, Bundesrepublik Deutschland

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