As a comment about Hen and Chicks (Sempervivum 'Atroviolaceum Heimlich 2')
that's a little bit difficult.....
the original S. 'Atroviolaceum Heimlich' should be a S. tetcorum-cultivar; but the shown plant isn't one; but there is another one in the collections which shows the real S. tectorum 'Atroviolaceum Heimlich';
because this one on the photos here is in many collections and it looks really nice we (in germany) decided to give it the name S. 'Atroviolaceum Heimlich 2' without the label tectorum and without breeder-informations (we don't know who create it);
all the photos here show this S. 'Atroviolaceum Heimlich 2'
the info also sold as: 'Atroviolaceum Secretly 2' is wrong because the word "Secretly" is only a translation of the word "Heimlich" - but this word comes from the breeder; Mina Colvin create it at the "Nursery Heimlich" in Woburn/Massachusetts/USA;
that's all we found out from germany.....if someone has other or further information please let me know;