•   Trillium albidum J.D. Freeman

•   Trillium angustipetalum (Torr.) J.D. Freeman

•   Trillium catesbaei Elliott

•   Trillium cernuum L.

•   Trillium chloropetalum (Torr.) Howell

•   Trillium cuneatum Raf.

•   Trillium decipiens J.D. Freeman

•   Trillium decumbens Harbison

•   Trillium discolor Wray ex Hook.

•   Trillium erectum L.

•   Trillium flexipes Raf.

•   Trillium foetidissimum J.D. Freeman

•   Trillium gracile J.D. Freeman

•   Trillium grandiflorum (Michx.) Salisb.

•   Trillium kurabayashii J.D. Freeman

•   Trillium lancifolium Raf.

•   Trillium ludovicianum Harbison

•   Trillium luteum (Muhl.) Harbison

•   Trillium maculatum Raf.

•   Trillium nivale Riddell

•   Trillium ovatum Pursh

•   Trillium parviflorum Soukup

•   Trillium persistens Duncan

•   Trillium petiolatum Pursh

•   Trillium pusillum Michx.

•   Trillium recurvatum Beck

•   Trillium reliquum J.D. Freeman

•   Trillium rivale S. Watson

•   Trillium rugelii Rendle

•   Trillium sessile L.

•   Trillium simile Gleason

•   Trillium stamineum Harbison

•   Trillium sulcatum Patrick

•   Trillium texanum Buckley

•   Trillium underwoodii Small

•   Trillium undulatum Willd.

•   Trillium vaseyi Harbison

•   Trillium viride Beck

•   Trillium viridescens Nutt.