For Trillidium
Floden, A.J., and E.E. Schilling. 2018b. Trillium undulatum as the second species of Trillidium. Pp. 477-478. In Weakley, A.S., B.A. Sorrie, R.J. LeBlond, A.J. Floden, E.E. Schilling, A.R. Franck, and J. Kees. 2018b. New combinations, rank changes, and nomenclatural and taxonomic comments in the vascular flora of the southeastern United States. IV. J. Bot. Res. Inst. Texas 12: 461-480.
Kim, C., S.C. Kim, and J.-H. Kim. 2019. Historical biogeography of Melanthiaceae: a case of out-of-North America through the Bering Land Bridge. Frontiers Plant Sci. 10: 396.
Patrick, T.S. 1985. Trillium undulatum forma enotatum, a new petal color form of the painted trillium. Rhodora 87: 157-158.
Weakley, A.S., B.A. Sorrie, R.J. LeBlond, A.J. Floden, E.E. Schilling, A.R. Franck, and J. Kees. 2018b. New combinations, rank changes, and nomenclatural and taxonomic comments in the vascular flora of the southeastern United States. IV. J. Bot. Res. Inst. Texas 12: 461-480.
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