Thank you for the new photos. I love the last ones.
I'll send the column photos to Mauro.
Do you got brown/violet spots all along the new leave which then disappear in a few months after blooming ? It's not characteristic but typical for luedde, as for lawrenceana.
You can see them at the top of the leave :
I have this famous cultivar of lueddemanniana, 'Cerro Verde'. Many think that it is a hybrid (with warscewiczii ?) because of its wide lip, small white streaks...