A month ago, I've bought a very tiny seedling of C. warscewiczii. The label says it is a sibling cross between two var. Sanderiana clones (C.H.#2 x C.H #1), from Taiwan (C.H. would mean Ching-Hua orchid nursery in Taiwan, I presume). Anyway, after carefully discarding sphagnum moss from the roots, I've put the tiny seedling in semi hydro set up, with pumice as the substrate...and it seems to like it.
It's now sending up three new growths...this guy is definitely doing great.
The roots are also growing nicely.
It would take years before it could bloom, so let's hope I keep it growing well.
BTW, one of the growths has two leaves instead of one, but some unifoliate species can have two leaves when they are very young, so it would be no big deal.