| Trillium erectum | L. (1753) |
| | Vækstforhold: Cool, rich, moist, neutral to acidic soils of upland deciduous forests, mixed deciduous-coniferous forests, coniferous swamp borders. |
| Trillium erectum var. album | Pursh (1814). Først navngivet som Trillium rhomboideum var. album Michx. (1803) |
| | Vækstforhold: Upland deciduous forested slopes, stream banks, wooded roadsides at lower elevations. |
| Trillium grandiflorum | Salisb. (1805). Først navngivet som Trillium rhomboideum var. grandiflorum Michx. (1803) |
| | Vækstforhold: Rich deciduous or mixed coniferous-deciduous upland woods, floodplains, roadsides. |
| Trillium ovatum forma hibbersonii | T.M.C.Taylor & Szczaw. (1975) |
| Trillium pusillum | Michx. (1803) |
| Trillium simile | Gleason (1906) |
| Trillium vaseyi | Harb. (1901) |
| Trillium albidum | J.D.Freeman (1975) |
| Trillium chloropetalum | Howell (1902). Først navngivet som Trillium sessile var. chloropetalum Torr. (1857) |
| | Vækstforhold: Variable habitat: edges, openings in and along ravines in redwood forest, thickets and tangles of cut-over forest, stream flats in deciduous woods, chaparral brushland, open wooded sloped on dunes, brushy islands in surprisingly open grasslands, but usually where soil remains moist most of the season. |
| Trillium kurabayashii | J.D.Freeman (1975) |
| Trillium luteum | Harb. (1901). Først navngivet som Trillium sessile var. luteum Muhl. (1813) |
| | Vækstforhold: Deciduous forests, thin open woods, rocky stream banks and flats, clearings and openings, old fields, rich mature forest on calcareous substrate. |
| Trillium recurvatum | L.C.Beck (1826) |
| Trillium sessile | L. (1753) |