The tubular exine ofLauraceae andHernandiaceae,a novel type of exine structure in seed plants |
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Authors: | Klaus Kubitzki |
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Affiliation: | (1) Institut für Allgemeine Botanik und Botanischer Garten, Postfach 30 27 22, D-2000 Hamburg 36, Bundesrepublik Deutschland |
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Abstract: | The pollen grains ofLauraceae andHernandiaceae are characteristic in having a tubular exine of ± microfibrillar structure. This is coated with a layer of medium electron-dense globules and very peculiar spines, made up of a substance differing from that of the exine. Such a pollen wall structure is otherwise unknown in seed plants and thus adds to the list of odd features erratically present in various taxa of the Ranalean complex. |
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Keywords: | Angiosperms Magnoliidae Lauraceae Hernandiaceae Pollen morphology pollen ultrastructure Angiosperm phylogeny |
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