Please cite this data as follows, and pay attention to the rights documented in the rights.txt:
Please respect the rights declared for each dataset in the download: 
naturgucker.de: naturgucker doi:10.15468/uc1apo
Real Jardín Botánico (CSIC): Real Jardin Botanico (Madrid), Vascular Plant Herbarium (MA)
GBIF-Sweden: SBT-Living doi:10.15468/u8bzai
Ájtte Museum: Ájtte
ArtDatabanken: Artdata doi:10.15468/kllkyl
Naturalis Biodiversity Center: Naturalis Biodiversity Center (NL) - Botany Leiden doi:10.15468/pal1lb
Finnish Museum of Natural History: Herbarium, Botanical Museum, University of Oulu, Finland (OULU)
Finnish Museum of Natural History: Herbarium, Botany Unit, Finnish Museum of Natural History (H)
Lund Botanical Museum (LD): Lund Botanical Museum (LD) doi:10.15468/c4w4co
GBIF-Sweden: OHN
GBIF New Zealand: New Zealand National Plant Herbarium (CHR) doi:10.15468/x5ucvh
Natural History Museum, University of Oslo: Vascular Plant Herbarium, Trondheim (TRH) doi:10.15468/zrlqok
National Institute of Genetics, ROIS: Plant Specimen Database of Tama Forest Science Garden, Forestry and Forest Products Research Institute, Japan
Natural History Museum, University of Oslo: Vascular Plant Herbarium, Oslo (O) doi:10.15468/wtlymk
Herbario SANT, Universidade de Santiago de Compostela: SANT herbarium vascular plants collection
JBRJ - Instituto de Pesquisas Jardim Botânico do Rio de Janeiro. Jabot - Banco de Dados da Flora Brasileira. Disponível em: [http://www.jbrj.gov.br/jabot]., http://www.jbrj.gov.br/jabot/formularios/comocitar_jabot.php doi:10.15468/7ep9i2
GBIF-Sweden: Herbarium of Umeå University (UME) doi:10.15468/gatdg4
GBIF-Sweden: Phanerogamic Botanical Collections (S)
GBIF-Sweden: Botany (UPS)
University of Bergen: Vascular Plant Herbarium, Bergen (BG)
Botanical Garden & Museum, Natural History Museum of Denmark: Botany registration database by Danish botanists
Natural History Museum, University of Oslo: Vascular Plants, Field notes, Trondheim (TRH) doi:10.15468/kkb2x0
Finnish Museum of Natural History: Herbarium (Åbo Akademi), Centre for Biodiversity, University of Turku (TURA)
Botanical Garden, University of Valencia: Jardi Botanic de Valencia: VAL
GBIF-Sweden: Wetland Inventory (NV)
Natural History Museum, University of Oslo: Tromsø Museum, Vascular plants
MNHN - Museum national d'Histoire naturelle: Vascular plants collection (P) of the Muséum national d'Histoire Naturelle (MNHN - Paris)
GBIF-Sweden: National Forest Inventory (SLU)