Rosa rugosa
During the Second World War Wilhelm Kordes II crossed the East Asian "Rosa wichurana" with the Japanese "Rosa rugosa" eventually to obtain a new species, "Rosa kordesii", able to withstand the harsh winters of north Germany. From it he later bred such famous post-war varieties as 'Parkdirektor Riggers,' 'Leverkusen,' Hamburger Phönix' and 'Heidelberg.' "The dark, glossy foliage of many modern roses can be traced back to 'Kordesii'."