A fieM survey ofNesohedyotis arborea reveals that there are 132 adult trees in the wild, making it one of the commoner endemic plants of St Helena. The trees exhibit leaky dioecy." females are entirely male-sterile, but 'males' do set a small amount of seed. The floral differences between the two morphs are marked." the female is longstyled with large, smooth stigmatic papillae and vestigial an...

†Background and aims Sexually dimorphic populations are often located in drier habitats than cosexual populations. Gender plasticity (GP), whereby hermaphrodites alter female and male functions depending on resources, and sex-differential plasticity (SDP) between hermaphrodites and unisexuals are predicted to affect sexual system stability. Here, GP and SDP are evaluated in cosexual and gynodio...

Angiosperm sexual systems are fundamental to the evolution and distribution of plant diversity, yet spatiotemporal patterns in angiosperm their drivers remain poorly known. Using data on distributions 68453 species, we present first global maps system frequencies evaluate during Cenozoic. Frequencies dioecy monoecy increase with latitude, while hermaphrodites more frequent warm arid regions. Tr...