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