VERY impressive. Extremely well grown. I had forgotten how beautiful this species is. I wonder why it hasn't been used for more hybrids - Eurychone rothschildiana comes to mind as a perfect cross.
I just acquired a Sobenikoffia humbertiana seedling. It's supposed to be very much like the robusta. I'd love to see a picture of your whole plant. How do you grow it, and how old is it? It's gorgeous!
That's pretty much the whole plant, with 3-4 more leaves sticking up (you can see the draping tips). The plant must be more than 25 years, originally grown in a pot, then a wooden basket, which is long gone. So it's just hanging from a wire hook, with all the roots you see. It wasn't always thriving, otherwise it might have been a bit bigger.