Replication Data for: Geographic Range vs. Occurrence Records in Plant Distribution Mapping: The Case of Arbutus in the Old World

Occurrence records of the present-day distribution of the genus Arbutus in the Old World. Records in Dataset 1 were retrieved from different sources and excluding stands known to have been historically introduced, as follows. GBIF (www.gbif.org): records were selected from countries where Arbutus is known to be native, considering only georeferenced point occurrence data from selected institutions and datasets of specimen collections (Herbaria) and vegetation surveys. Citizen science datasets were excluded. A complete list of the selected institutions and datasets, along with the DOI download reference, is reported. IUCN Red List (www.iucnredlist.org): the geographic ranges of A. andrachne, A. canariensis, and A. pavarii were retrieved from the respective online assessments. Other databases and online repositories that are not donated to GBIF, whose reference is reported in Dateset 1, include: The Botanical Society of Britain & Ireland, Nationwide Vegetation Plot Database–Sapienza University of Rome, Flora Ionica; FAO Map Catalog; EU-Forest; Flora Croatica Database; Lebanon Flora; TÜBİVES-Turkish Plants Data Service. Literature: an extensive bibliographic survey was carried out on regional floristic checklists, vegetation surveys, conservation reports, scientific papers, and National Floras. The literature search was especially devoted to those regions that are underrepresented in the above-listed databases. A complete list of references is available in Dataset 1. Dataset 1 is made up of 12,644 occurrence records, including A. unedo (11,474 records), A. andrachne (1010 records), A. canariensis (129 records), and A. pavarii (41 records). Figure 1 is a map of the data sources for the occurrence records of the genus Arbutus.