Thank you for that information Peter, it is much appreciated. Awhile back we tried to figure this one out, but couldn't come up with any information that helped us.
You are our European 'Sherlock Holmes' of the sempervivum world.

Peter will you look at the photos of both entries Boule de Neige and Boule de Nigre and see if you think they are the same sempervivum?

my german semps-friends call me "The Sheriff of names and informations"

I believe they are correct.

Peter will you look at the photos of both entries Boule de Neige and Boule de Nigre and see if you think they are the same sempervivum?

valleylynn said:
Peter will you look at the photos of both entries Boule de Neige and Boule de Nigre and see if you think they are the same sempervivum?

may be - but photos are no good background for a decision; it might be better to compare directly;

I'll see what I can do about that.
I have one of them and can get the other.