Name this Trillium?

Good Friday finds

 Trillium Question for you all, So last year I saw this growing in a local woodland park and for some reason I wanted to call it T. chloropetalum, This year I went poking around in the same woodland and found a bigger population of it, and here I am again and scratching my head now because it looks an aweful lot like T. kurabayashii. But then I started doing my research again and I realize that neither of those species grows this far north. 

Can any trillium experts out there give a decent id? I would be pretty stoked to find out it's some northern subspecies and it gets named for me, I mean after all isn't that the holy grail for any plantsman? I always wish I could have lived back in the days of true botanical exploration, when almost every plant you saw stepping off a sailing ship was new to science. Or maybe its just Trillium kurabayashii actually has a disjunct northern population? Sunny and warm with temps hitting the 60's this week, and the weekend looks almost as good! Happy easter to you if you are out hunting eggs.  Cheers, Mark