So you can imagine my disappointment when I found out that they may not actually be lucky clovers. There is another plant, very similar to the original clover (which has three leafs - the fourth one only appears when there is a mistake in the cell division) and this "generic" clover's leaf is always divided in four parts. Beds of four leaf clovers are very rare, not to say probably nonexistent. So, my proud "lucky clovers" may not be as special as I thought they were. Nonetheless, I'm still very fond of them.