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The role of inner staminodes in the floral display of some relicMagnoliales

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Abstract

The inner staminodes (between stamens and carpels) in some relicMagnoliales (Austrobaileyaceae, Degeneriaceae, Eupomatiaceae, andHimantandraceae) are not just reduced stamens; they are very elaborate organs. InEupomatiaceae, Himantandraceae, and probablyDegeneriaceae they have their own secretory structures which do not occur on the stamens. These play an important role in floral biology. They contribute to the floral coloration pattern; they effect herkogamy by their position and by movements; they provide shelter and food tissue and food secretions (?) for pollinating beetles; they secrete odouriferous oils, mucilage (probably for pollen adherence) and water or nectar (?). For theHimantandraceae a new secretory region on the base of the inner staminode is described. These complicated inner staminodes are extreme specializations of primitive floral types. They have no counterparts in more advanced subclasses of the angiosperms.

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  1. Institut für Systematische Botanik der Universität, Zollikerstrasse 107, CH-8008, Zürich, Switzerland

    Peter K. Endress

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  1. Peter K. Endress
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Endress, P.K. The role of inner staminodes in the floral display of some relicMagnoliales . Pl Syst Evol 146, 269–282 (1984). https://doi.org/10.1007/BF00989551

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  • DOI: https://doi.org/10.1007/BF00989551

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