Thanks Janice. : )
Twit, what a gorgeous photo of heuff. 'Xanthoheuff' blooms. Would it be okay for me to add it to the database for you? We don't have a bloom photo for that heuff.
Interesting observation on the cluster. I went back through the few heuff. bloom photos I have and they all are in a cluster like yours. What's interesting is what happens once they mature into seeds.
heuffelii
Ahhhhhh, I thought I had a photo of a sempervivum seed cluster for comparison.