Just for the record, I've pulled out my Cribb's "The Genus Pahiopedilum" to look for the green in adductum's dorsal. Here's what he writes about the adductum speices:
"...is readily distinguished by its decurved petals and strange abbreviated staminode. In most Paph. species, the staminode lies above the stigma closing off to potential pollinators the gap between the sides of the claw and the lip. In P. adductum the staminode is aberrant and very small, merely a short knob with pubescent sides lying above the column base."
I've never looked for staminode shape/color as an identifier, but Jason did in his guesses. So I've learned something new here. That's why I love these quizzes - they teach you so much about the parents! Thanks again, Hoa!