Jurriaan M. de Vos

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The type section of Primula (Primulaceae), here considered to include seven species, is phylogenetically quite isolated in its genus. Although its species are popular ornamentals, traditional medicinal plants and model organisms for the study of heterostyly, the section has not yet been studied from a phylogenetic or evolutionary perspective. Using(More)
The evolution of the flower is commonly thought to have spurred angiosperm diversification. Similarly, particular floral traits might have promoted diversification within specific angiosperm clades. We hypothesize that traits promoting the precise positional transfer of pollen between flowers might promote diversification. In particular, precise pollen(More)
The interaction between floral traits and reproductive isolation is crucial to explaining the extraordinary diversity of angiosperms. Heterostyly, a complex floral polymorphism that optimizes outcrossing, evolved repeatedly and has been shown to accelerate diversification in primroses, yet its potential influence on isolating mechanisms remains unexplored.(More)
Zanne et al. 1,2 addressed an important evolutionary question: how did flowering plants repeatedly enter cold climates? Herbaceous growth, deciduous leaves, and narrow water-conducting cells are adaptations to freezing. Using phylogenetic analyses, they concluded that herbs and narrow conduits evolved first in the tropics (''trait first''), facilitating(More)
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