there are a lot of serious nurseries with a lot of wrong plants.....
if you look at our database (I have no right to show the pictures here) you can see how the "real" Xandra has to look like:
http://www.sempervivum-liste.d...
we have learned that there is no nursery without mistakes at the labels....
to rescue your poor plants you have to pull out the healthy ones, remove all try leaves and put them into fresh substrate; so they can bulid fresh roots and grow; it seems they even have no real good contact to the ground;
not every arachnoideum-cultivar has much web; even if the "sex-partner" is for exampel a tectorum ;-)
but Xandra has a lot of web!!
Persephony I don't know - never heard before; I can't say if it has to have web;
