Reproductive isolation in plants occurs through multiple barriers that restrict gene flow
between populations, but their origins remain uncertain. Work in the past decade has shown …

OCBIL theory aims to develop an integrated series of hypotheses explaining the evolution
and ecology of, and best conservation practices for, biota on very old, climatically buffered …

Since Darwin, the diversity of flowers has been attributed to selection by pollinators.
Although pollinators commonly act as selective agents on floral traits, determining the extent …

A goal of evolutionary biology is to understand the roles of geography and ecology in
speciation. The recent shared ancestry of sister species can leave a major imprint on their …

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

The flora of southern Africa has exceptional species richness and endemism, making it an
ideal system for studying the patterns and processes of evolutionary diversification. Using a …

Polyploid speciation entails substantial and rapid postzygotic reproductive isolation of
nascent species that are initially sympatric with one or both parents. Despite strong …

Much of what we know about speciation comes from detailed studies of well‐known model
systems. Although there have been several important syntheses on speciation, few (if any) …

Abstract The Cape region of South Africa is one of the most remarkable hotspots of
biodiversity with a flora comprising more than 9000 plant species, almost 70% of which are …

Plants adapted to special soil types are ideal for investigating evolutionary processes,
including maintenance of intraspecific variation, adaptation, reproductive isolation, ecotypic …