With more than 600 recognized species, Elaphoglossum (Dryopteridaceae) is one of the most species-rich and taxonomically complex genera of ferns in the world. Despite being the focus of extensive taxonomic and systematic study, many species groups of Elaphoglossum remain taxonomically intractable and several important evolutionary relationships within the genus are still unresolved. Improving our understanding of Elaphoglossum diversity is important because the genus is one of the most species-rich, dominant, and frequently collected vascular plant genera in many areas of tropical America, where ca. 500 species of Elaphoglossum occur. In this talk, we present the first phylogenomic study of Elaphoglossum, including more than 230 accessions and target-capture data from ca. 400 nuclear loci. We infer a phylogeny that is largely congruent with those reported previously, but with improved support and the recovery of novel clades and previously unsampled taxa. Our phylogenomic analyses also reveal, for the first time, the importance and frequency of reticulate evolution in Elaphoglossum. By integrating our phylogenomic data with information extracted from floristic accounts and herbarium specimens, we are able to present a data-driven assessment of the current state of knowledge for Elaphoglossum for the first time. From this, we highlight persistent challenges impeding the study of Elaphoglossum today and identify priorities and opportunities for research looking forward.