The four-leaf clover is a rare variation of the common three-leaf clover. There are several causes for the fourth leaf, which is usually smaller than the others. It could be from a recessive gene appearing at a low frequency, by somatic mutation, or by a developmental error of environmental causes.
The interaction of several genes that happen to segregate in the individual plant could also be the cause. It's possible that all these explanations could apply to individual cases, lending to many four-leaf clovers found in the same patch.
While they are rare, it is not impossible to find a four-leaf clover. The first step? Get out and search for them! Clovers like to grow in groups, so look for a large patch. You'll want to set out on your clover expedition during the day - they are much harder to spot at night since they fold up their leaves at night. Once you've found the perfect spot, scan the patch looking for difference in shape between clovers. Remember to relax. Searching for four-leaf clovers should be fun, and relaxing, not stressful! Did you find one? Place it between 2 sheets of paper to keep it safe.
Looking for four-leaf clovers has become a St. Patrick's Day tradition, but the history of behind them dates back hundreds of years. Ancient legends refer to them as a symbol of good luck - claiming to warn of evil spirits coming, or to have magical protection against bad luck. The leaves of the clover are often said to stand for faith, hope, love, and luck.
"Luck is what happens when preparation meets opportunity" -Seneca
