I know that bivittatus is a species of Cryptanthus but I'm curious if there are actually cultivars with Bivittatus as part of the name?

I submitted a proposal to delete which may have been an error on my part. I'm not certain but I believe this to be the correct entry: Earth Star (Cryptanthus 'Lueddemannii')

I also noticed database listings for the two below and I'm wondering whether they are correct or not?

Thanks, Lin. I approved your proposal and I'll convert the other two to cultivar entries.

Actually, according to the Bromeliad registry, all three of these plants might be synonyms for Cryptanthus 'Lueddemanii.' I'll do some more research and make the appropriate corrections.

Yes, they're all the same plant. Fixed now.

Thanks so much for all your hard work, Zuzu!!