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  • Dynamic of flower opening and closure throughout the day
    in

    Complementary circadian rhythms regulate floral attractiveness and reward in Silene colorata

    Most Silene species possess either diurnal or nocturnal pollination syndromes. Prieto-Benítez et al. study a Silene species with mixed floral features to reveal the finely tuned relationships between flower responses such as petal opening, nectar production and scent emission, and overall pollination success as governed by complementary circadian rhythms. The circadian rhythm regulating floral attractiveness […] More

  • Examples of flowers of Leandra s.str.
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    Diversity and constraints in the floral morphological evolution of Leandra s.str.

    Processes related to floral diversification and the relation of floral diversification to speciation are largely unaccounted for in the Melastomataceae. Reginato and Michelangeli describe the floral diversity of Leandra s.str. on a continuous framework and investigate its floral evolution. The authors observe that Leandra flowers appear to be quite distinct, but without discrete flower types. […] More

  • Schematic representation of the evolution of a morphological structure following or not following the ontogenetic scaling expectation.
    in

    Evolution of flower development during an adaptive radiation in Caiophora

    The rare occurrence of a reversion to an ancestral state following adaptive radiations of pollination syndromes suggests that changes in the ancestral developmental programme of flowers are common in this scenario. Strelin et al. provide evidence that the latter took place during the recent diversification into different pollination syndromes (bee, hummingbird, and rodent pollination) of […] More

  • Pollination shift in Neotropical Malpighiaceae
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    Pollination shift in Neotropical Malpighiaceae

    Pollination shift in Neotropical Malpighiaceae Flowers of Neotropical Malpighiaceae have a specialized pollination system in which floral oils instead of nectar are offered to attract oil-collecting bees. Cappellari et al. examine facultative loss of oil production by non-oil-secreting (eglandular) flowers in relation to pollination by bumblebees in populations of Pterandra pyroidea from the Brazilian Cerrado. […] More