| Melanthiaceae | |
Trillium recurvatum fo. esepalum
| Freeman & Heineke | Rhodora 89: 17 | 1987 |
| Melanthiaceae | |
Trillium recurvatum fo. foliosum
| Steyerm. | Rhodora 61: 124 | 1959 |
| Melanthiaceae | |
Trillium recurvatum subsp. lanceolatum
| (Boykin ex S. Watson) A.E. Murray | Kalmia 13: 32 | 1983 |
| Melanthiaceae | |
Trillium recurvatum var. lanceolatum
| Boykin ex S. Watson | Proc. Amer. Acad. Arts 14: 273 | 1879 |
| Melanthiaceae | ! |
Trillium recurvatum fo. luteum
| Clute | Amer. Bot. (Binghamton) 28(2): 79 | 1922 |
| Melanthiaceae | * |
Trillium recurvatum fo. luteum
| Friesner | Butler Univ. Bot. Stud. 3: 29, 31 | 1929 |
| Melanthiaceae | |
Trillium recurvatum fo. petaloideum
| Steyerm. | Rhodora 61: 124 | 1959 |
| Melanthiaceae | |
Trillium recurvatum fo. recurvatum
| | | |
| Melanthiaceae | |
Trillium recurvatum fo. shayi
| E.J. Palmer & Steyerm. | Ann. Missouri Bot. Gard. 22(3): 504 | 1935 |