This interesting little Aroid is a west African native and is not closely related to Syngonium, (sometimes incorrectly called Nephthytis in the trade.) Seems easy so far but Ive only grown it for a few weeks so time will tell.
Nephthytis swainei
Very nice, I love discovering new ones too, I never have much luck with Syngonium, I prefer the thicker leaf aroids, more forgiving in my climate.
celt33040, this species actually has pretty thick little leaves. Not like the relatively thin leaves of the unrelated Syngonium, (well they are related but in different tribes). I believe Nephthytis would need plenty of shade and moisture though.
Just saw your green house, that's quite a collection, well done.