Definition that contains sometimes
- paris sometimes placed in subfamily Trilliaceae
- bluebell sometimes placed in genus Scilla
- genus nelumbo sometimes placed in the family Nymphaeaceae: lotuses
- phase iv clinical trial sometimes the FDA approves a drug for general use but requires the manufacturer to continue to monitor its effects; during this phase the drug may be tried on slightly different patient populations than those studied in earlier trials
- genus convallaria sometimes placed in family Convallariaceae: lily of the valley
- smilax sometimes placed in Smilacaceae
- genus jacquinia sometimes placed in family Myrsinaceae
- hydrangea family sometimes included in the family Saxifragaceae
- genus vespula sometimes considered a subgenus of Vespa: social wasps
- genus liriope sometimes placed in family Convallariaceae: lilyturf