Cypripedium kentuckiense x macroanthos ( Henry Oakeley 2013)

C. macroanthos distribution: European & Asiatic Russia to eastern Siberia and Kamchatka, Sakalin Island, Korea, north-eastern China and Japan, in meadows, scrub and forest in damp places and light shade, often on slopes and banks, sea level to 2400m. C. kentuckiense - distribution U.S.A. (Texas, Mississippi, Kentucky, Ohio, Missouri, Arkansas, Louisiana and Tennessee), in mesophytic woodland, mainly in deep ravines, on acid sandstone soils and on the banks of rivers and streams.

Frosch, W., Cribb, P.. (2012). Hardy Cypripedium. Kew Publishing, Royal Botanic Gardens, Kew. p.54 & p.60

'Humans: Skin allergen'-HTA Guidelines

HTA Guide to Potentially Harmful Plants, 3rd Edition (2022)