Cattleya walkeriana var. alba 'Perfect Charm' & type

[RosieC]

Originally Posted by Rosim_in_BR

Rosie, here are some: Lip structure (both the central lobe and side lobes don't match with the plants normally found in nature). The flower that is always born atop of a leafed and enlarged pseudo-bulb (the regular is a perfect floral stem, not enlarged, without leaf, emerging from the base of the new pseudo-bulb); the height of the pseudo-bulbs, which are taller and thinner than the normal;
Sometimes, to justify the presence of a leafed pseudo-bulb with the flowers emerging from the top, not the base, some say that it would be the variety princeps. This so called variety princeps are occasionally found in nature, but in my opinion, these plants are not pure, having obviously genetic introgression of Cattleya loddigesii.

Thanks Mauro, really interesting. I had noticed the lip structure difference, but wasn't sure that was enough to make a distinction. The other stuff you list really does seem to make them different though.