BHL (Biodiversity Heritage Library): Cornus mas EOL (Encyclopedia of Life): Cornus mas ePIC (electronic Plant Information Center): Cornus mas GBIF (Global Biodiversity Information Facility): Cornus mas Google: Web - Images - Scholar GRIN (Germplasm Resources Information Network): Cornus mas IPNI (International Plant Names Index): Cornus mas Ispot: Cornus mas JSTOR Plant Science: Cornus mas Kew Herbarium catalogue: Cornus mas Mansfeld World Database of Agricultural and Horticultural Crops: Cornus mas The Plant List (version 1.1): Cornus mas Tropicos: Cornus mas