Editing Trillium (section)

===Other taxa===

{{As of|April 2023}}, [[Plants of the World Online]] does not accept these taxa:

* ''Trillium parviflorum'' {{small|V.G.Soukup}} is an accepted name by some authorities<ref>{{ThePlantList |id=kew-290601 |taxon=Trillium parviflorum |authority=V.G.Soukup |accessdate=10 August 2019}}</ref><ref name="FNA 242102003">{{eFloras |1 |242102003 |Trillium parviflorum |volume=26 |last=Case Jr. |first=Frederick W. |access-date=23 July 2019}}</ref> while others regard this name as a synonym of [[Trillium albidum|''T.&nbsp;albidum'']] subsp. ''parviflorum'' {{small|(V.G.Soukup) K.L.Chambers & S.C.Meyers}}.<ref>{{WCSP |290601 |''Trillium parviflorum''}}</ref>{{r|POWO:258353-2}}

The following taxa are of historical interest:

* ''Trillium rivale'' {{small|S.Watson}}<ref name="FNA 242102009">{{eFloras |1 |242102009 |Trillium rivale |volume=26 |last=Case Jr. |first=Frederick W. |access-date=July 16, 2019}}</ref> has been segregated to a [[Monotypic taxon|monotypic]] genus as ''[[Pseudotrillium rivale]]'' {{small|(S.Watson) S.B.Farmer}}.{{r|Farmer and Schilling 2002}}
* ''Trillium'' ×&nbsp;''crockerianum'' {{small|Halda}} was originally described as a hybrid with parents ''Trillium ovatum'' and ''Trillium rivale'',{{r|IPNI:1015183-1}} but since the latter is now a member of genus ''[[Pseudotrillium]]'', the hybrid has become an undescribed [[intergeneric hybrid]], and therefore its taxonomic placement is uncertain.{{r|POWO:1015183-1}}