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Pollen grain wall structure ofCaytonanthus arberi (Caytoniales) |
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| Authors: | Michael S. Zavada William L. Crepet |
| Affiliation: | (1) Botany Department, The University of the Witwatersrand, 1 Jan Smuts Ave., 2001 Johannesburg, South Africa;(2) Biological Sciences Group U-43, The University of Connecticut, 06268 Storrs, CT, USA |
| Abstract: | The pollen grain wall structure ofCaytonanthus arberi was studied with SEM and TEM. The monosulcate, bisaccate pollen grain of this taxon has an alveolar wall structure that is more like that found in saccate Conifers than primitive Angiosperms. Pollen grain morphology does not support a Caytonialean ancestry for the Angiosperms. |
| Keywords: | Gymnosperms Angiosperms Pteridosperms Caytoniales Caytonanthus Ultrastructure pollen |
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