i know this is a very old threat but i bump across this photo while i was google-ing for pics of catasetum viridiflavum.
the pics above looks somehow more to catasetum integerrimum than viridiflavum.
a viridiflavum lip is more towards globous with a conical cap while integerrimum lip is conical. and also the lip orifice of viridiflavum is not a perfect round circle with small teeth structure on the lip near the column region while integerrmum is round and without teeth on its border.
i hereby attach two pics from the net for comparison. would like to hear opinions from you guys about this one. thanks
catasetum viridiflavum
Catasetum viridiflavum | Flickr - Photo Sharing!
catasetum integerrimum
Catasetum integerrimum 'Papelito' | Flickr - Photo Sharing!