This is what I'd say, too.I'd say a lot closer to wardii........................
There are no natural hybrids of venustum with those two other species. Wardii is separated by geographical terrains of mountains and sukhakulii is in Thailand (far from NE India states and Bhutan). This was discovered in my venustum research.To me this looks like a natural hybrid or a population with significant gene introgression. (wardii x venustum) or (suhkakulii x venustum). The resemblance to wardii or suhkakulii is much stronger than the resemblance to venustum.
Whether a natural hybrid or a natural species, I don't know.
If I can figure out how to do it, I can send the pollen to you.Very nice Per, Not often seen!
If i remember correct its Origin are Philippines, so gar away from the distribution from venustum...
Per i have also one in flower. Are you intrested in exchange Pollen to propagate this species.