As a comment about Hen and Chicks (Sempervivum 'Chivalry')
this plant is not the real S. 'Chivalry'; we have had this plant in german collections too;
in 12/2010 the breeder told Erwin Geiger how his cultivar has to look like:
"S. 'Chivalry' is a velvety red, sort of like an improved more narrow-leaved version of 'Cleveland Morgan'."
the wrong plant shown here looks very similar to Hen and Chicks (Sempervivum x christii 'Collecteur Anchisi')
; in germany we all placed it to the NOIDs nevertheless;
in 08/2012 we found a plant in an old collection which seems to be the right one; but it has to be checked around the year and presented to the breeder for a final conclusion;