The pervasiveness of the effects of selection on neutral and total genetic diversity in species is a major question in evolutionary genetics. It is becoming increasingly understood that selection can greatly alter the local coalescent histories of genomic regions linked to selected loci, which are otherwise considered to evolve neutrally. This can have major impacts on estimates of summary statistics and demography and can bias population genetic models. Additionally, in plants, linked selection studies to date have mainly focused on species-wide datasets, which may lead to underestimation of the impact of linked selection on local populations. Here we present a model fitting of linked selection to a sample of 189 individuals from a single population of the obligate outcrossing plant model species Capsella grandiflora. We show that linked selection has wide-ranging effects on genetic diversity, and compare our results to similar findings in the highly self-fertilizing Arabidopsis thaliana. Improved knowledge of local coalescent histories and landscapes of genetic diversity in this model species will improve the quality of future population genetic analyses as well as guide future studies on the relative impacts of positive and negative selection and genetic drift in a widely applicable plant family..