a beautiful flower , indeed.
How do you know its sublaeve?
I looked again at Averyanows article on Vietnamese forms and some earlier discussions in this forum and got totally confused.
Soon my first potentianums are opening and I will compare them to normal? callosums.
The plant was bought as sublaeve and I believe i got this one from FrankRC. I use to have a std callosum v. callosum. They tend to be larger in all aspects with wavy dorsals. The typical callosum's dorsal would even have a bad twist to the dorsal. The smaller plants which have had many names over the years tend to have tamer dorsals or tailored as it maybe looked at.
Now thats the million dollar question! There are several ways to look at the barbatum group. Two popular ways are; its one species with a massive land coverage where some look like the type barbatum and others are callosum sublaeve at their extreme or they started out as two separate species, barbatum and callosum expanded their area of occupation and have inter-bred so much so its hard to tell apart with many intermediates. I favor the two species growing into each other myself.