Hi Paul.
Great questions. This is what I find:
The only reference I find to helveticum is that it is a synonym, some say for S. montanum. What is on the market right now as S. 'Helveticum' does not look like a montanum species type semp?
http://www.youngs-garden.com/s...
http://mountaincrestgardens.co...
We do have an entry in the database.
Hen and Chicks (Sempervivum 'Helveticum')
Nothing is really know about this semp, 'Helveticum'.
Your photo is lovely, but no way of identifying it. I would love to see what it looks like through the seasons.
