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About the Cover
Cover: Nectaries are secretory structures involved in attracting pollinators to angiosperm flowers. Unlike the floral organs, whose positions are invariant across angiosperm species, nectaries can be found in association with any of the floral organs. This is exemplified by the positions of the nectary in Nicotiana tabacum (left) at the base of the carpels, in Liriodendron tulipifera (right) on the inner sides of the petals and in Arabidopsis thaliana (background) at the bases of the stamens. Nicotiana and Liriodendron nectaries are naturally orange, in both likely due to carotenoid pigments; the Arabidopsis nectaries are false coloured. For further details, see article by S. F. Baum, Y. Eshed and J. L. Bowman, in this issue, pp. 4657-4667.
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