This is the opening paper in the special issue of Fungal Diversity, which collates the data on
defining species. Defining and recognizing species has long been a controversial issue …

The genus Quercus is among the most widespread and species‐rich tree genera in the
northern hemisphere. The extraordinary species diversity in America and Asia together with …

Gossypium, the cotton genus, includes∼ 50 species distributed in tropical and sub-tropical
regions of all continents except Europe. Here we provide a synopsis of the evolutionary …

Evolution is happening all around us. In many cases–lately, due to technological advances
in molecular biology–scientists can now describe the evolutionary process in exquisite …

Polyploidy is a dominant feature of extant plant diversity. However, major research
questions, including whether polyploidy is important to long‐term evolution or is just …

Hybridization, incomplete lineage sorting, and phylogenetic error produce similar
incongruence patterns, representing a great challenge for phylogenetic reconstruction …

Phylogenomic data from a rapidly increasing number of studies provide new evidence for
resolving relationships in recently radiated clades, but they also pose new challenges for …

Hybridization between diverging lineages is associated with the generation and loss of
species diversity, introgression, adaptation, and changes in reproductive mode, but it is …

Simultaneously modeling hybridization and the multispecies coalescent is becoming
increasingly common, and inference of species networks in this context is now implemented …

ABSTRACT Building the Tree of Life (ToL) is a major challenge of modern biology, requiring
advances in cyberinfrastructure, data collection, theory, and more. Here, we argue that …