Euphorbia × gayeri merupakan tumbuhan menahun dari famili Euphorbiaceae (suku kastuba-kastubaan). Tumbuhan ini berasal dari bioma beriklim sedang dengan rentang sebaran mulai dari Eropa tengah hingga Rumania.
POWO (2024). "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; https://powo.science.kew.org/."
IPNI (2024). "International Plant Names Index. Published on the Internet http://www.ipni.org, The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries, and Australian National Herbarium"
USDA - NRCS (2024). "United States Department of Agriculture - Natural Resources Conservation Service", Plant Profile.
