Paphiopedilum or Phragmepedium with largest flower

[Roberta]

For Paph sanderianum progeny, the classic is Paph. Prince Edward of York - sanderianum x rothschildianum. I'm not familiar with hybrids that followed. If you get a seedling of this type, you'll need patience - they are slooowwww. But I have seen some magnificent ones.

In the Phrag department, for sure Phrag kovachii has some magnificent offspring. And I think that Phrags grow a good bit faster than multi-floral Paphs.