SILVA HERNÁNDEZ DE SANTAOLALLA , José Luis

La sección Pustulati del género Sonchus (Asteraceae) está constituida únicamente por tres especies de hábitat rupícola: S. pustulatus Willk., S. fragilis Ball y S. masguindalii Pau & Font Quer, cuyas poblaciones se encuentran restringidas a áreas muy reducidas no superpuestas dentro de la región Bético-Rifeña (Mediterráneo occidental). Las tres...

Species of Sonchus section Pustulati (Sonchus masguindalii, Sonchus fragilis and Sonchus pustulatus) constitute a group of endemic cliff plants in the Mediterranean region, restricted to narrow non-overlapping areas within the Baetic-Rifan hotspot of plant species diversity. S. pustulatus occurs both in SE Spain and N Africa, whereas the other...

The mating systems of species in small or fragmented populations impact upon their persistence. Small self-incompatible (SI) populations risk losing S allele diversity, responsible for the SI response, by drift thereby limiting mate availability and leading to population decline or SI system breakdown. But populations of relict and/or endemic...

We studied the morphological variability of Sonchus asper (L.) Hill in the western Mediterranean region by means of multivariate analysis. A two-step clustering method indicated that selection of a two-cluster model was optimal, with anther length and ligule length as the main characters contributing to cluster delimitation. These variables...

PREMISE OF THE STUDY: The high biodiversity in the Baetic-Rifan hotspot of Mediterranean region is shaped by complex geological and climatic histories and has been a subject of recent intensive studies. However, very little is known about phylogenetic and biogeographic history of three rare and critically endangered cliff-dwelling species of...