Phylogenomic sequence data from the genus Physocarpus (Rosaceae)
Physocarpus (Neillieae: Rosaceae) has undergone numerous taxonomic changes with little systematic attention, resulting in a lack of taxonomic clarity at local, regional, and global scales. The genus occupies an intercontinental disjunction between eastern Asia and North America, as well as an intracontinental disjunction within North America. The goal of this project was to clarify the systematics of Physocarpus in the context of these biogeographic patterns, including questions regarding the extent of introgressive hybridization and the order of lineage divergence.