Definition that contains sometimes
- paris sometimes placed in subfamily Trilliaceae
- bluebell sometimes placed in genus Scilla
- entoprocta sometimes considered a subphylum of Bryozoa
- forficula auricularia sometimes destructive to cultivated bulbs
- yew family sometimes classified as member of order Taxales
- genus polygonatum sometimes placed in subfamily Convallariaceae
- cryptogramma sometimes placed in family Polypodiaceae or Cryptogrammataceae
- genus convallaria sometimes placed in family Convallariaceae: lily of the valley
- genus muscari sometimes placed in family Hyacinthaceae
- hydrangea family sometimes included in the family Saxifragaceae