Do you have any photos of newly emerging Lewisia seedlings?
Alas, I have regretted not taking pics of Lewisia cotyledon seedlings more than any other, I think. Seedlings are so cute when you transplant them: at only a couple months old, they already have nice thick caudices and lots of heft. But the two cotyledons are quite broad and succulent from the get-go, and very glabrous.
The only Lewisia seedling pics I have are of L. rediviva, which are very different looking from L. cotyledon.