The link shows two open pollinated seedlings of R. acicularis Nipponensis (the 14 chromosome version of R. acicularis). I have many other open pollinated seedlings of R. acicularis Nipponensis that are very similar to the rose pictured on the right. The one on the left is different from all the others. I do not know if the change is from is a chance hybride or a doubled chromosome occurance.
See http://home.neo.rr.com/kuska/R.acicularisnipponensis.htm