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Plants pose a well-known challenge to the biological species concept because hybridization is a common occurrence. Range dynamics have a crucial role in determining whether species are given the opportunity to interbreed or not. Successful hybridization can be of particular concern when considering rangelimited species and their persistence. In my thesis research, I examine the apparent hybrid zone between the southern Oregon endemic Ranunculus austrooreganus, a candidate threatened species duedoi:10.15760/etd.7450 fatcat:zalacbpvafb5jpqrblo6x55gyq