I have only just caught this last discussion on Geranium lasiopus. Unfortunately there wasn't a plant on display - I found one for sale on Blackthorn's stand, but where Robin obtained it, or any further details are lacking. In leaf it is very reminiscent of smaller and tighter forms of cinereum, except the leaves are less indented and more rounded in outline, and a lovely soft silver-grey. I have planted it in deep sandy gravel so hopefully will be able to photograph it in flower next year. i will see if I can get more information from Robin.