Trillium catesbaei Elliott. | Trillium grandiflorum (Michx.) 'Flore Pleno' |
Trillium cernuum L. | Trillium luteum Harbison |
Trillium chloropetalum (Torr.) Howell. | Trillium sessile L. |
Trillium cuneatum Raf. | Trillium tschonoskii Maxim. |
Trillium grandiflorum (Michx.) Salisb. | Trillium undulatum Willd. |