Book  (2021)  Page(s) 215-216.  Includes photo(s).
 
Damask roses .... 'Svea' ...Origin of the variety is unknown. Pom's assessment is that 'Svea' is a spontaneous sport of 'Belle Cathérine' and that it is of Swedish origin. ...Known in culture in Sweden at least since the 1930s ... Description .... According to the method which Pom utilizes, 'Svea' has the same DNA-profile as 'Belle Cathérine' and 'Parten'. Their similarity index is 100%. The next nearest relatives are 'Trigintipetala' ...'Quatre Saisons' ..'Quatre Saisons Blanc Moussuux, which have a similarity index of 68,0% with 'Svea', 'Belle Cathérine' and 'Parten'. The next are 'Helga Schiemann' and 'Geschwinds Nordlandrose' ...with similarity indices of 54,2 respectively 48,1%.