Definition that contains sometimes
- paris sometimes placed in subfamily Trilliaceae
- bluebell sometimes placed in genus Scilla
- genus ornithogalum sometimes placed in family Hyacinthaceae
- hydrangeaceae sometimes included in the family Saxifragaceae
- 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
- vespula sometimes considered a subgenus of Vespa: social wasps
- smilax sometimes placed in Smilacaceae
- family taxaceae sometimes classified as member of order Taxales
- genus jacquinia sometimes placed in family Myrsinaceae