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  • Aster amellus
    in ,

    Unmasking cryptic biodiversity in polyploids

    Up to one-quarter of flowering plant species may have escaped recognition due to processes such as autopolyploidy-whole genome duplication events where polyploids may be morphologically identical to their diploid progenitors. Mairal et al. combine macroevolutionary, microevolutionary and niche modelling tools to disentangle the origin and demographic history of the polyploid complex of Aster amellus (Asteraceae). […] More

  • Pelargonium
    in

    Floral nectar tubes in Pelargonium

    Co-evolutionary matches between lengths of floral nectar tubes and pollinator proboscises is associated with speciation in several lineages, including Pelargonium (Geraniaceae), a genus renowned for morphological variation. Tsai et al. investigate how differences in nectar tube lengths develop in two closely-related species. The Pelargonium nectar tube is unique among plants and arises from a localized […] More

  • Geographical range of Stauracanthus species in the Iberian Peninsula
    in

    Environmental niche divergence among dune shrub sister species

    Geographic distributions of species are constrained by their ecological requirements. Chozas et al. study the distribution, environmental responses and evolutionary relationships of the three species of the genus Stauracanthus to assess the processes driving their diversification and current geographic ranges. These species show similar responses to climate, supporting the hypothesis that all members of this […] More

  • A phylogenetic tree for species of Saxifragales with a reconstruction of habitat evolution using SIMMAP (see key for colours)
    in

    Phylogenetic insights into the evolution of Saxifragales habitat shifts

    Species-level phylogeny and habitat evolution data are applied to the hyper-diverse angiosperm clade Saxifragales to reveal that habitat shifts are very rare. Saxifragales lineages are likely to remain rooted within their ancestral environment, and Rubio de Casas et al. demonstrate that in the exceptional cases where diversification has occurred, repeated colonization from other environments results […] More

  • A fossil flowe
    in

    Dead End Street: Is self-fertilisation the end of the road for flowering plants?

    One of the basic and most widely accepted hypotheses in plant breeding systems is that flowering plant species that embrace self-fertilisation enter an evolutionary “dead end”, and are destined for extinction. The theory is based on the assumptions that it is impossible for species that exclusively self-pollinate to return to outcrossing, and that in such […] More

  • Phylogeny and biogeography of subgenus Ceratotropis
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    Phylogeny and biogeography of subgenus Ceratotropis

    Phylogeny and biogeography of subgenus Ceratotropis The subgenus Ceratotropis in the genus Vigna is widely distributed from the Himalayan highlands to South, South-East and East Asia. Javadi et al. determine a molecular phylogeny of Ceratotropis and show that major clades correspond to the geographic distribution of species, which diverged during the late-Pliocene–Pleistocene. The results imply […] More

  • Intercontinental colonization and Mediterranean radiations in Erodium
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    Intercontinental colonization and Mediterranean radiations in Erodium

    Intercontinental colonization and Mediterranean radiations in Erodium The genus Erodium is a common feature of Mediterranean climates throughout the world, but the Mediterranean Basin has significantly higher diversity than other areas. Fiz-Palacios et al. find that biogeographic reconstructions point to Asia as the ancestral area of Erodium (approx. 18 MYA), with establishment of Mediterranean climates […] More