Purple Trillium buds
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.
Trillium erectum, also known as wake-robin, red trillium, purple trillium,Beth root, or stinking Benjamin, is a species of flowering plant native to the east and north-east of North America. It is a Spring ephemeral, an herbaceous perennial whose life-cycle is synchronised with that of the deciduous forests where it lives.