Cultivar probably refers to Walter Ingwersen (1883-1960) or one of his family, nurserymen in East Grinstead. b. Hamburg d. E Grinstead. Alpine specialist, collected in Balkans and Caucasus.

Desmond, Ray. (1977). Dictionary of British and Irish Botanists and Horticulturists. Taylor and Francis, London.

In traditional medicine the species of this plant has been used as an aphrodisiac (Usher. G. A Dictionary of Plants Used by Man. Constable 1974)

https://pfaf.org https://pfaf.org/user/Plant.aspx?LatinName=Geranium+macrorrhizum

Europe, Southwestern Europe

Europe, Southeastern Europe