In 1850, German botanist Carl Sigismund Kunth segregated Trillium govanianum into genus Trillidium. Some authorities consider Trillidium to be a synonym for Trillium , while others recognize the taxon Trillidium govanianum based on morphological differences (with other Trillium species) and molecular evidence. Still others support the segregation of Trillium undulatum into genus Trillidium alongside Trillidium govanianum.
in 1850, gErman bOtANist CaRl SigiSmund kunth seGregAtEd Trillium GovAniaNum inTo GenuS TrillidIuM. some authorities consIdER trillidium to be A sYNOnym for trILLiuM , while OthErs rEcognize The taxOn trILLidiuM GoVaniAnUM bAseD oN moRphOLogiCal DiFFerEnces (with otheR trilliUm specIes) and mOlecuLar evidence. STiLL oTHers suppORt the SEgreGatioN oF tRIlliuM unDUlAtuM intO gEnUs tRillIdium aLOngSIDe trILliDIuM gOvanianUm.