The clover is a symbol of serenity and prosperity, which shares with the triskell the symbology related to number three.

The triskell, in its meaning of birth, death and rebirth, symbolizes ciclicity, eternity.

Requested by Noemi.

A curiosity: once, when fields had been harvested, they were let rest one year by sowing them with clover. This meant that the harvest had already been collected in the granaries, and hence the meaning of prosperity and serenity.