possibly with some T. flexipes involved. The somewhat nodding posture and the lightness of the ovaries is like T. flexipes. The length of the filament is more like T. erectum. This was a tight clump of numerous flowers - pics are not all the same individual.
During my camping trip at Sibbald Point with some girlfriends.
We were happy to see Trilliums around the camping zones that were closed and unavailable.
Something i notices, was they they were very close to water deposits