The harp is Ireland's national emblem, so that is not a type of three-leafed clover. What you are referring to is the shamrock, but while it is one symbol used for Ireland, it is not the national emblem.
A three leafed clover!
4 leafed clover
Four leafed clover is considered to be lucky.
luckier than four leaf clover.
A clover is a small three or four leafed plant.
You are referring to the shamrock, but contrary to popular belief, it is not the national symbol of Ireland. The national symbol of Ireland is the harp, which you will see on coins and on official documents. The shamrock is an emblem of Ireland, but not the official one.
threatain it with a 4 leafed clover
The four leaf clover became lucky a long time ago in ancient Ireland. First off four leaf clovers are rare so if someonefound one it was a sign of good luck. That is how the four leaf clover became so lucky!
Usually in a meadow.
It's more rare than the 4-leafed clover, of course, but not as lucky I assume. You can make up your own rules; it's not like it makes any difference.
Yes.It gives you the power to break fairy spells and make them visisble.If you pluck a four leafed clover and stand really still they can become visisble.
No it is not. Most naturally occurring clovers only have 3 leaves. That is why a four leafed clover is considered to be good luck; because of it's rarity. Technically speaking, a clover with four leaves is a slight mutation of the clover genome. Much like a man who has six fingers on one hand, only that case is far rarer than a four leafed clover.