Sikkim, Uttarakhand), Nepal, N Pakistan Trillium undulatum – New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec; Connecticut, Georgia, Kentucky, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, West Virginia The following taxon is an intergeneric hybrid: Trillium × crockerianum (Trillium ovatum × Pseudotrillium rivale) – California Other taxa , Plants of the World Online does not accept these taxa: Trillium texanum , also known as Trillium pusillum var. texanum , are considered by some authorities to be synonyms for Trillium pusillum var. pusillum. Trillium tennesseense is considered by some authorities to be a synonym for Trillium lancifolium Trillium parviflorum is an accepted name by some authorities while others regard this name as a synonym of T. albidum subsp. parviflorum . The following taxon is of historical interest: Trillium rivale has been segregated to a monotypic genus as Pseudotrillium rivale . Distribution Trillium species are native to North America and Asia. North America More than three dozen Trillium species are found in North America, most of which are native to eastern North America. Just six species are native to western North America: T. albidum, T. angustipetalum, T. chloropetalum, T. kurabayashii, T. ovatum, and T. petiolatum. Of these, only T. ovatum is pedicellate-flowered. Canada Trillium species are found across Canada, from Newfoundland to southern British Columbia. The greatest diversity of species are found in Ontario, Quebec, and Nova Scotia. Alberta: T. ovatum, T. scouleri British Columbia: T. hibbersonii, T. ovatum, T. scouleri Manitoba: T. cernuum New Brunswick: T. cernuum, T. erectum, T. undulatum Newfoundland: T. cernuum Northwest Territories: none Nova Scotia: T. cernuum, T. erectum, T. grandiflorum, T. undulatum Nunavut: none Ontario: T. cernuum, T. erectum, T. flexipes, T. grandiflorum, T. undulatum Prince Edward Island: T. cernuum, T. undulatum Quebec: T. cernuum, T. erectum, T. grandiflorum, T. undulatum Saskatchewan: T. cernuum Yukon: none United States Except for the desert regions of the southwestern United States, Trillium species are found throughout the contiguous U.S. states. In the western United States, species are found from Washington to central California, east to the Rocky Mountains. In the eastern United States, species range from Maine to northern Florida, west to the Mississippi River valley. Trillium species are especially diverse in the southeastern United States, in Georgia, Tennessee, Alabama, North Carolina, and South Carolina. The state of Georgia is home to 21 species