I remember reading somewhere that "Dortmund" self-seeds very easily, but that most of the seedlings resemble the mother plant. This certainly was the case for me - The "Dortmund" I grew long ago has died, but I found a seedling next to it, which I gave to a friend. (NO, it was NOT a sucker.)
At least a decade later, that seedling is growing over her rose arbor and is HUGE. I don't see any difference between what I call "Dortmund's Daughter" and her mom. I'lll have to check it more closely!
HMF does list a number of roses that Mr. Moore "discovered" - perhaps some were seedlings.
During his long life, in addition to all his lovely minuature roses, Mr. Moore always seemed to be interested in crossing unusual varieties with each other.
This Rose is a continiously flowering Rose in my garden, so it is much more than occasionally repeating in in the Netherlands. A beauty and nice colored hips (much!) in autumn/winter.
In Florida as well, as long as we dead-head it, it repeats regularly and heavily. If not deadheaded, it makes great masses of hips, with little repeat bloom.
