That variety is from Viet Nam as well. The yellow type of helenae comes from Cao Bang area, and this new version var. delicatum comes from Thai Nguyen. The leaves of the latter are a little bit different, usually thinner and a littrle bit more yellow on a general basis. I have seen a lot in bloom last season, and so far none had a really good shape...
The colourform was only described by LIU and ZHANG as a distinct species - Paphiopedilum delicatum. They wrote that the plant came from middle-Vietnam without precise locality. The difference to the earlier described Paph. helenae was only the colour.
So we combined it in the journal of the German Orchid Society 'Die Orchidee' to Paphiopedilum helenae forma delicatum
The plant which we showed has not so a bad shape and a very nice unusual colour. I hope that it will be propagated artificially soon.