Bract blades not mottled (except sometimes in T. ovatum). Flower pedicellate except subsessile or sessile in T. pusillum var. virginianum. Petals wide-spreading, white, reddish purple, or cream, sometimes with patterns of another color.

Distribution

North America.

Discussion

Species 15 (15 in the flora).

Selected References

Barksdale, L. 1938. The pedicellate species of Trillium found in the southern Appalachians. J. Elisha Mitchell Sci. Soc. 54: 271–296.

Ihara, H. and K. Ihara. 1978. A biosystematic study on the pedicellate-flowered species of the North American Trillium. (1) Geographical distribution of major groups and their gynoecium norms. J. Geobot. 25: 139–172.

Lower Taxa

Trillium catesbaei, Trillium cernuum, Trillium erectum, Trillium flexipes, Trillium grandiflorum, Trillium nivale, Trillium ovatum, Trillium persistens, Trillium pusillum, Trillium rivale, Trillium rugelii, Trillium simile, Trillium sulcatum, Trillium undulatum, Trillium vaseyi