Trifolium repens is not only The Luck of The Irish, it is considered to bring luck all over Europe and maybe all over the world. I remember when we ere kids we used to search for the one having four leaves.

the odds of finding a four-leaf clover are 1 in 10,000

Looks like we were lucky as we were always finding some.
Reading your article made me realize how little I know about it. I didn't even know it's edible.