If one wants to find a four-leaf clover, they should look in a patch of white clover (Trifolium repens) or red clover (Trifolium pratense) to find genuine mutant clovers.
Trifolium subterraneum | Trifolium repens | Trifolium resupinatum | Trifolium incarnatum | Trifolium pratense | Trifolium occidentale | Cow wheat (''Melampyrum pratense'') |