Figure 2.

Number of scientific articles published between 1951 and 2020 referring to Utricularia and separated by research areas: anatomy and morphology, systematics and taxonomy, ecology and physiology, genetics and genomics. Each spot presents all articles published by each five years. The literature survey was conducted in the Web of Science (Clarivate Analytics) using the keywords: “(anatom * or morphology * or architecture * or structure *) and (utricularia or bladderwort *)” for the topic Anatomy/Morphology, “(systematic * or taxonom * or phylogeny * or cladistic *) and (utricularia or bladderwort *)” for Systematics/Taxonomy, “(ecology * or physiology * or ecophysiology *) and (utricularia or bladderwort *)” for Ecology/Physiology, and “(genetic * or genomic * or transcriptome * or proteome *) and (utricularia or bladderwort *)” for Genetics/Genomics. Following this non-exhaustive survey, all papers were manually inspected of their title, abstract, and keywords.