Trillium hibbersonii (T.M.C.Taylor & Szczaw.) D.O’Neill & S.B.Farmer, Phytotaxa 436: 193. 2020.

Basionym: Trillium ovatum Pursh forma hibbersonii T.M.C. Taylor & Szczaw., Syesis 7: 250. 1974.

Type:— CANADA. British Columbia: near Boat Basin, Hesquiat Harbour, west coast of Vancouver Island, elev. 2000 ft., 1938, Hibberson s.n. (holotype: UBC!) .

Homotypic synonyms: Trillium ovatum Pursh var. hibbersonii (T.M.C.Taylor & Szczaw.) G.W.Douglas & P.Pojar, Canad. Field-Naturalist 115: 343. 2001. Trillium hibbersonii Wiley, nom. nud., Rare wildflowers of North America. 1968.