the leaves look more like barbatum... callosum leaves are held more upright and they are rigid, not limp... possibly calloso-barbatum (natural hybrid)? hehe...anyway, its very nice..! wish mine would bloom...
Where are you? Many years ago, it was reported that many of the so-called "barbatums" in the US were really callosum v. sublaeve (or its synonym, "thailandense"). Which your's definitely looks like. But I do admit that the floiage is closer to barbatum.....however, mottled leaf paphs have great variability in their patterns. My guess is callosum sublaeve....Take care, Eric
You barbatum certainly looks very callosum-like, at least bloom-wise. I have barbatum but the dorsal is not nearly as large as yours....but then it's been so long since it bloomed, that I am beginning to forget what it looked like!
I was reading last night in Cribb's book that there appeared to be integrades between barbata and callosum sublaeve near the edge of their ranges. This was leading him to believe that they may not be distinct species from each other (rather than hybrids of distinct species).
Despite the darker color of a more typical barbata, they do seem very similar structurally.