Argyroderma sp, what species is it? (pics)

[meizzwang]

Any idea what species this is? It has a mild, sweet fragrance and only opens up when exposed to full sun. Flower has been blooming for almost a week!

[iann]

That's a tough one. Apart from a few obvious species, Argyrodermas are pretty hard to tell apart. I'd guess at A. delaetii, but no promises.