The distribution and habitat preferences of the declining species Orobanche arenaria Borkh at the northern limit of its geographical range

摘要

Three new sites of Orobanche arenaria were discovered during floristic investigations in the Wy?yna Ma?opolska upland in central Poland. The new localities are concentrated in the Ponidzie area (Garb Pińczowski ridge and Niecka Po?aniecka basin) and form the northern limit of the geographical range of O. arenaria. The paper presents information on the distribution of Orobanche arenaria in Poland, the abundance at the sites and habitats occupied by the species.