Definition that contains sometime
- paris sometimes placed in subfamily Trilliaceae
- bluebell sometimes placed in genus Scilla
- class ascidiaceae sometimes classified as an order: sea squirts
- genus jacquinia sometimes placed in family Myrsinaceae
- genus liriope sometimes placed in family Convallariaceae: lilyturf
- genus maianthemum sometimes placed in family Convallariaceae: false lily of the valley
- genus scilla sometimes placed in subfamily Hyacinthaceae
- family strophariaceae sometimes included in family Agaricaceae
- phylum entoprocta sometimes considered a subphylum of Bryozoa
- family mimidae sometimes considered a subfamily of Troglodytidae: mockingbirds; catbirds; thrashers