Pretty much all of the brasilian bifoliates except those in sections Rhizantha and Intermedia can be spotted. As for a complete list of potentially spotted species:
aclandiae
amethystoglossa
bicolor
elongata
granulosa
guttata
harrisoniana
leopoldii
loddigesii
porphyroglossa
schilleriana
schofeldiana
tenuis
velutina
Those are the species I know to be spotted. I think that there may be occasional clones of C. intermedia with speckles, but it isn't really a breeding characteristic common to the species, and C. harrisoniana and loddigesii are also not really known for breeding spots, though they can be quite speckled, sometimes.
-Cj
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