I've been growing this plant for long time, twelve years more or less. It is one of my all time favs because of the naturally yellow flowers with showy lips. I have been always very careful with its cultural needs, but three years ago I decided to give a piece for a dear friend. Did the cut in a bad hour for sure, because the plant lost almost all pseudo bulbs (only two left at the time) all the leaves fell and the plant went down to a seedling size. I thought I was loosing it when I decided one year and a half ago to plant what had rested of it in pure moss. The best thing I could have done

! The reaction can be seen in the photo that follows.
Cattleya rex flowers:
Cattleya rex O'Brien on Flickr - Photo Sharing!
Detail of the showy lip:
Cattleya rex O'Brien on Flickr - Photo Sharing!
The two pbs and the small one that originally were planted in the moss and the new ones I got in one and a half year: