Cattleya Souvenir Delavisis X Cattleya Bob Betts

[Marlene]

It does looks very elegant, and I love the large size, and frilliness! Very nicely grown. I will definitely look to add a Catt like this to my collection. Thank you for sharing!
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[PaphMadMan]

There is a Cattleya Souvenir de Louis Sander which was crossed with Cattleya Bob Betts to produce Cattleya Augusta Rutledge.

That's probably the best bet. Assuming Souvenir is correct there is no other registered Cattleya alliance hybrid with a name that is a closer match, unless 'Delavisis' could have been a cultivar of C. Souvenir.

C. Souvenir de Louis Sander does have that registered cross with Bob Betts, and like Bob Betts it is a hybrid with a lot of C. mossiae and C. gaskelliana background with 1-2 other big Catts in the mix. Logical breeding with BB and likely to give offspring that look like BB.

C. Souvenir was also a big Catt hybrid but mostly C. trianae and C. dowiana, so less likely to be a white flower so similar to BB. It has no registered hybrids at all, so no evidence it ever was used in successful breeding. The other C. Souvenir was a former Slc. with mostly S. coccinea and L. cinnabarina background. That can certainly be ruled out.

So this is most likely C. Augusta Rutledge, with the usual disclaimer about NoIDS - you never really know. But if you have room for a gorgeous big floofy white C. Bob Betts type NoID this looks like a good one...

[masum]

Beautiful bloom