(Trillium Kurabayashii) Giant Purple Wakerobin

Trillium kurabayashii, the giant purple wakerobin,is a species of flowering plants native to southwestern Oregon and northern California.

Trillium kurabayashii is a perennial herb spreading by means of underground rhizomes. Flowering stems are up to 55 cm tall, with purple or maroon flowers. Fresh flowers usually have a spicy odor.
en.wikipedia.org

https://en.wikipedia.org/wiki/Trillium_kurabayashii