Paphiopedilum callosum callosum, June 1972, roll 197206H4red slide 2. Species described in 1892.
Paphiopedilum callosum 'Freed', August 1968, roll 196808H1 slide 15. Species described in 1892.
Paphiopedilum callosum L.D., August 1968, roll 196808H1 slide 2. Species described in 1892.
Paphiopedilum callosum new sanderae, July 1978, roll 197807H8 slide 1. Species described in 1892.
Paphiopedilum callosum new sanderae, July 1978, roll 197807H8 slide 2. Species described in 1892.
Paphiopedilum callosum new sanderae, July 1978, roll 197807H8 slide 3. Species described in 1892.
Paphiopedilum callosum new type, December 1977, roll 197712H6 slide 2. Species described in 1892.
Paphiopedilum callosum new variety, June 1973, roll 197306H12 slide 15. Species described in 1892.
Paphiopedilum callosum new variety, June 1973, roll 197306H12 slide 16. Species described in 1892.
Paphiopedilum callosum new variety, June 1973, roll 197306H12 slide 17. Species described in 1892.
Paphiopedilum callosum sanderae, Rands, no date on slide. Species described in 1892.
Paphiopedilum callosum schmidtianum, November 1967, roll 196711H1 slide 18. Species described in 1892.
Paphiopedilum callosum sublaeve, album dorsal, June 1977, roll 197706H5 slide 1. Species described in 1892, this form split out as Paph. sublaeve in 1979.
Paphiopedilum callosum sublaeve, June 1972, roll 197206H4red slide 5. Species described in 1892, this form split out as Paph. sublaeve in 1979.
Paphiopedilum callosum, April 1968, roll 196804H4 slide 12. Species described in 1892.
Paphiopedilum callosum, February 1970, roll 197002H5red slide 11. Species described in 1892.
