Very nice I really like this flower
As to "was a popowii, or humboltii or what used to be called warscewiczianum"
Marilyn Ledoux is a friend, and I have often been to her greenhouse, I have seen how she labels her plants. Marilyn is very careful about keeping names correct. She has been aware of, and on top of all the name changes. If she registered a cross as being made with caudatum, you can take it to the bank that she used a caudatum. Grande is another mater. She and I have discussed that many plants labelled Grande could have been made with any one of the species with long petals, crossed with a longifolium. If she used a dark Grande, it could have either species, popowii or caudatum in its background. But in this case I am confident the caudatum parent was caudatum.