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There are few anatomical studies of the reproductive organs of Swietenia macrophylla, despite its economic importance. This study aims to describe the structural and ultrastructural organization of the petaline nectaries in mahogany flowers. Flower buds and flowers at anthesis were collected, fixed, and processed for studies under light and electron microscopy. Nectaries occur in the median region...
Nectaries in leaves of Gentianaceae have been poorly studied. The present study aims to describe the distribution, anatomy, and ecological aspects of extrafloral nectaries (EFNs) of three Calolisianthus species and in particular the ultrastructure of EFNs in Calolisianthus speciosus during leaf development, discussing its unusual structure. Leaves of Calolisianthus species were fixed and processed...
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