Au jardin, forum de jardinage

http://rosefile.com/RosePages/GlossaryOZ.html a écrit :Rosa kordesii - This is one of a tiny number of species roses bred by man (another is r. lutea, a yellow used by Pernet-Ducher to create Soleil d'Or). Kordes worked for decades to do so and finally succeded in crossing rosa rugosa with rosa wichuriana. (more correctly Max Graf is this cross and r kordesii is the fertile seedling obtained by self-pollinating this plant for decades.)

It is less important as a garden specimen than as an ancestor to roses that are tough, vigorous, and disease-free. Silver Jubilee, the highest ARS-rated hybrid tea has a kordesii ancestor. So do Dortmund and John Cabot, the second and third highest rated climbers.