| red trillium | (n) trillium of northeastern United States with sessile leaves and red or purple flowers having a pungent odor, Syn. sessile trillium, toadshade, Trillium sessile |
| purple trillium | (n) trillium of eastern North America having malodorous pink to purple flowers and an astringent root used in folk medicine especially to ease childbirth, Syn. birthroot, red trillium, Trillium erectum |