Trilliaceae (Trillium Family) Synonym(s): Yellow Wakerobin, Yellow Trillium Base Flower Color: YellowReproductive Phenology: Mar, Apr, May, JunBloom Notes: How to tell the difference between this trillium and a yellow Trillium cuneatum. The filaments of the two species are different colors. The filaments of Trillium luteum are greenish white and those of Trillium cuneatum are brownish