So Sempervivums are not as popular or well known here in Australia as it is in USA or Europe; which is something that I am trying to change a little if I can. Hence we get a lot of posts in various succulent Facebook groups people asking to get their plants identified.
Helpful well meaning people who have a few Semps always reply back and say it is 'X' or "it looks like my X'. Without coming across rude when I notice those sort of posts I always write back to say it is impossible to identify cultivars correctly when the label is lost. Try to tell them about the thousands of cultivars being available (even though cultivars available in Australia are in the hundreds) and depending on the growing conditions and the season the plants looking different.
I made the following two photos to illustrate what I mean. What do you think of them? I am hoping to do a few more similar comparisons when I have the opportunity as the plants change over time.
The below photos were all taken on the same day
Two arachnoideum types growing about a meter apart in an exposed location
Same arachnoideum growing in two different locations; one exposed to the elements and the other in a protected location with a bit more water.
Serkan