Tim,
The latest taxonomic revision puts all of the Sempervivum and former Jovibarba into Sempervivum. They did retain two sections of the genus so the former Jovibarba are in the Jovibarba SECTION now.
The cultivars are mostly a mix so it's just S. 'Lipstick'. An exception would be ones from a single species such as S. calcareum 'Extra'.
All of the heuffelii cultvars are derived from a SINGLE SPECIES. Thus, they can be designated S. heuffelii 'Hot lips'. This will also clear up the cultivar names for which we have both a heuffelii and semp with same name. These would be written as S.'Jade' and S. heuffelii 'Jade'.
Hope that makes it clear!
Kevin
