Trillium plant that could use a good rain wash.

Pacific Trillium (Trillium ovatum) Native plant growing in a semi-shaded woods near the coast.
This unique wildflower emerges in spring, its distinctive 3-petaled white infloresence brightening the deep shade and dark colors of the moist forest floor. The white petals can fade to pink or even red as they age. Single flowers bloom on a short peduncle, rather than being sessile as in other trilliums, and are framed by three sepals and three broad leaves resulting in a pleasingly balanced composition. The pedicel (flower stalk) is diagnostic. Trillium ovatum has one but T. albidum does not. It grows slowly, spreading from rhizomes and does best in moist acidic soils with high organic matter and dappled sun to full shade. Banana slugs love it. Peak bloom time: Feb-April.

https://oregonflora.org/taxa/index.php?taxon=8936

Plants of Monterey County: an Illustrated Field Key, 2nd edition, Matthews and Mitchell, 2015, pp. 328-329.

Jepson eFlora https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=47239

Monterey County Wildflowers https://montereywildflowers.com/melanthiaceae/