Our understanding of homoploid hybrid speciation has advanced substantially since this
mechanism of species formation was codified 50 years ago. Early theory and research …

Ecology affects each of the three principal processes leading to speciation: genetic
differentiation among populations within species, acquisition of reproductive isolation …

Even before the publication of Darwin's Origin of Species, the perception of evolutionary
change has been a tree-like pattern of diversification-with divergent branches spreading …

A key question in ecological genetics is to what extent do plants adapt to changes in climatic
conditions, such as drought, through plasticity or evolution.• To address this question, seeds …

Although invasive plant species often have a hybrid ancestry, unambiguous evidence that
hybridization has stimulated the evolution of invasive behaviors has been difficult to come …

Widespread recognition of the importance of biological studies at large spatial and temporal
scales, particularly in the face of many of the most pressing issues facing humanity, has …

Adaptation can occur on ecological time-scales (contemporary evolution) and adaptive
divergence can cause reproductive isolation (ecological speciation). From the intersection of …

The role of hybridization in adaptive evolution is contentious. While many cases of adaptive
trait introgression have been proposed, the relevant traits have rarely been identified …

While homoploid hybridization was viewed as maladaptive by zoologists, the possibility that
it might play a creative role in evolution was explored and debated by botanists during the …

Sunflowers of the genus Helianthus are models for hybridization research and contain three
of the best-studied examples of homoploid hybrid speciation. To understand a broader …