Trilliums East of the Cascade Mountains of Oregon and Washington
The Genus Trillium
Western Wake Robin: Trillium ovatum
Western Wake Robin: Trillium
ovatum: Petals white. Flowers on peduncles. Leaves sessile.
Idaho Trillium, Petiled Wakerobin, Purple Trillium, Purple Wakerobin, Round-leaved Wake-robin: Trillium petiolatum: Petals maroon. Flowers sessile. Leaves with
petioles.
Paul Slichter