A shamrock is a three leaf clover. There are very rare
shamrocks, though. These ones are four leaf clovers. The four leaf
clovers is the most rarest leaves ever.
Are shamrocks and clover belong to the same plant family?
Shamrocks simply refer to four-leaved small clover-like plants.
There are three species of clover and one species of medick that
all grow in Ireland and normally have three leaves. Shamrocks are
simply normal clover/medick that grew an extra leaf. As four leaves
is not normal, they are very rare.