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  • Nectar secretion in an ornithophilous bromeliad
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    Nectar secretion in an ornithophilous bromeliad

    Several members of Bromeliaceae show adaptations for hummingbird pollination in the Neotropics; however, the relationships between floral structure, nectar production and pollination are poorly understood. Stahl et al. analyse the functional aspects of nectar secretion related to interaction with pollinators by evaluating floral biology, cellular and subcellular anatomy of the septal nectary and nectar composition of […] More

  • Passerine pollination in a winter-flowering tree
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    Passerine pollination in a winter-flowering tree

    Birds can be alternative pollinators for winter-flowering plants outside the tropics where low temperatures limit insect activity. Feng et al. observe pollinator visitation to loquat (Eriobotrya japonica, Rosaceae) and exclude birds and other animals from the flowers. They determine that in late winter two passerine birds (Pycnonotus sinensis and Zosterops japonicus) are effective pollinators, and that […] More

  • Mixed bird and wasp pollination systems in Scrophularia
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    Mixed bird and wasp pollination systems in Scrophularia

    It has generally been considered that the flowers of Scrophularia are mainly pollinated by wasps. Ortega-Olivencia et al. study the four species with the largest and most striking flowers in Europe and Macaronesia (S. sambucifolia, S. grandiflora, S. trifoliata and S. calliantha) and demonstrate the existence of a mixed pollination system between Hymenoptera and passerine […] More

  • Nectary spur anatomy of selected Aeridinae
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    Nectary spur anatomy of selected Aeridinae

    The nectary spur is a characteristic feature of Aeridinae; a large, orchid subtribe displaying diverse pollination strategies.  Stpiczyńska et al. describe and compare its anatomy for a range of entomophilous and ornithophilous species. Structural nectary features shared by Asiatic Ascocentrum and certain bird-pollinated, Neotropical orchids assigned to Maxillariinae, Laeliinae and Oncidiinae are indicative of convergence. More