When you search the word "Irish Leaf", the shamrock from Ireland usually results. It is a symbol of Ireland. Ireland's music history correlates to immigrants and independence. Music was always dear to the lives of the Irish. A single melodic line with rhythmic accompaniment is a traditional musical setting.
This composition has an original, not traditional melody.
A flugelhorn solo introduces the song. Then the music develops as an affectionate gentle rhythm accompanies the melody, like a chorus.
Towards the end of the piece, the introductory melody reappears as a chorus.