The Genus Trillium
Giant Purple Wakerobin, Kurabayashii's Wakerobin: Trillium kurabayashii (Synonyms: Trillium angustipetalum, Trillium chloropetalum) - Leaves mottled with dark and light splotches on a green back ground. Flowers sessile, situated directly atop the trio of leaves. Petals and sepals maroon in color, the petals closely erect.
Pacific Trillium, Western Wake-robin, Western Trillium: Trillium ovatum ssp. ovatum (Synonym: Trillium ovatum var. ovatum) - Leaves typically solid green on their upper leaf surface. Flowers held above the trio of leaves on a thick stem or peduncle. Petals are white, aging to purple or maroon. Sepals greenish and smaller than the petals.