gg5 said:
Peter here is a photo of my arach x Nevadense which doesn't have much webbing, and yet is considered an arachnoideum.
Greg, if you cross a arachnoideum with any other taxon it's possible that some of the seedlings have no web;
but Laggeri isn't a cross - it's a clean arachnoideum;
S. nevadense is an old name and it now is called S. minutum;
http://www.catalogueoflife.org...
on our homepage we have an entry S. arachnoideum x S. minutum;
http://www.sempervivum-liste.d...
you can see that there is one summer-photo with web and one without; that's because it's a cross and the result isn't consistent;
Peter
