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Thanks, David. I haven't come across this species in any of my ref. books, so my id was the nearest guess I could make. It's a lovely little rose with such a beautiful perfume.
This species is also used as a rootstock for the more colourful cultivars, I think the fact that it is thornless makes it useful to rose budders!
David J Trevan
Lat/Lng: 53.609, -2.30277
OS grid ref: SD800125