Arthur de Lima Silva and colleagues present a hypothesis of floral evolution for the family, illustrating a shift from bisexuality to unisexuality and the evolution of nectaries in a complex monocot family, which can...
The Berg hypothesis proposes that specialized-flower traits experience stronger stabilizing selection than non-floral structures and predicts that variation in specialized-flower traits will be mostly uncorrelated with...
In natural hybrid zones, traits often show clines, gradual variation across a gradient reflecting a balance between natural selection and gene flow. Changes over time in average values for traits, and especially the...
Some flowers only smell at day and some only at night, but how did they evolve these different rhythms? In our study, we investigate if populations of the same orchid species that are more pollinated either at day or at...
Bilateral symmetry has evolved as an adaptive trait linked to efficient pollination and successful outcrossing, occurring over 170 times in angiosperms and in many plant groups relying upon the asymmetric expression of...
Almost 60 years ago, Berg proposed that floral integration and pollination system should be associated as a consequence of the selective pressures promoting successful cross-pollination. Evidence, however, suggests...
Floral bilateral symmetry (zygomorphy) has evolved at least 70 times during the history of angiosperms, whilst radial symmetry (actinomorphy) is the ancestral and most common state for angiosperms as a whole. Sauquet et...
Pollinator-driven speciation week continues, with Floral adaptation to local pollinator guilds in a terrestrial orchid, a paper by Sun, Gross and Schiestl. The star is the orchid Gymnadenia odoratissima, and orchid...
The spatial separation of stigmas and anthers (herkogamy) functions to reduce self-pollination and avoid interference between pollen dispersal and receipt. Little is known about the evolutionary relationships among the...