Molecular markers contribute to our understanding of the
entry, spread, and evolution of invasive species as a foundation upon which
appropriate management strategies are developed. Cogongrass (Imperata cylindrica L.
Beauv.), introduced into the United States shortly after the turn of the
twentieth century, is an aggressive, invasive weed species that colonizes a
diverse range of habitats. Genotypic diversity and spread dynamics at the
point of initial introduction and its adjacent areas in the southern