Originally Posted by illustrator
About C. cordata: does anyone know of a dealer in Europe who sells this species (whichever form)? I read a lot about this plant but never saw it offered for sale over here ...
Sorry to butt into damian's post, but c. cordata blassi is relatively common. I believe it was first cultivated in Germany and you shouldn't have much difficulty finding it from an online seller based in western Europe.
The other species of the cordata complex are much rarer and probably only available through other hobbyists.