3 Works

Facilitation and competition shape a geographical mosaic of flower colour polymorphisms

Anina Coetzee, Colleen Seymour & Claire Spottiswoode
1. Flower colour differs dramatically between populations for some plant species, yet we know little about what drives this variation. Such polymorphisms can be influenced by plant-pollinator interactions, but whether they are also influenced by pollinator-mediated plant-plant interactions is unknown. 2. We test whether flower colour polymorphisms can arise through convergence (facilitation) or divergence (competition) of flower phenotypes resulting from plant-plant interactions mediated by the shared, and only, pollinator (orange-breasted sunbird) of ten Erica communities...

A new sectional classification of Lachenalia (Asparagaceae) based on a multilocus DNA phylogeny

Graham D. Duncan, Carl D. Schlichting, Felix Forest, Allan G. Ellis, Alan R. Lemmon, Emily Moriarty Lemmon & G. Anthony Verboom
Lachenalia J.Jacq. ex Murray (Asparagaceae; Scilloideae; Hyacintheae) is a large and morphologically diverse genus of more than 140 bulbous species endemic to southern Africa. Previous attempts to infer a well resolved and robustly supported phylogeny of Lachenalia using Sanger sequencing of candidate loci and/or morphological characters have been largely unsuccessful. Consequently, the current infrageneric classification is artificial and there is a need to explore alternative avenues to produce a phylogenetic classification. In this paper we...

High rates of evolution preceded shifts to sex-biased gene expression in Leucadendron, the most sexually dimorphic angiosperms

Mathias Scharmann, Anthony Rebelo & John Pannell
Differences between males and females are usually more subtle in dioecious plants than animals, but strong sexual dimorphism has evolved convergently in the South African Cape plant genus Leucadendron. Such sexual dimorphism in leaf size is expected largely to be due to differential gene expression between the sexes. We compared patterns of gene expression in leaves among ten Leucadendron species across the genus. Surprisingly, we found no positive association between sexual dimorphism in morphology and...

Registration Year

  • 2021

Resource Types

  • Dataset


  • South African National Biodiversity Institute
  • University of Cape Town
  • Royal Botanic Gardens
  • University of Lausanne
  • University of Connecticut
  • Stellenbosch University
  • Florida State University