Paphiopedilum thailandense, Rojander via Keyes, February 1979, roll 197902H2 slide 8. This "intermediate species" was proposed in 1979 without a description, as an isolated population from the Thai portion of the Malay Peninsula with features of both Paph. callosum and barbatum. The image is the same one published with the designation sp. nov. in Orchid Digest 43(6):220 (November, 1979), but here with much darker color.
