Lyrics and music by the author of When Irish Eyes are Smiling, one Chauncey Olcott. He wrote it for A Romance of Athlone, and it was published in 1899.

Here is the chorus. It is best sung with great gusto while extremely drunk:

My Wild Irish Rose,
The sweetest flower that grows.
You may search everywhere,
But none can compare
With my wild Irish Rose.

My Wild Irish Rose,
The dearest flower that grows.
And someday for my sake,
She may let me take,
The bloom from my wild Irish Rose.

Start now and learn it for St. Patrick's Day! Sure and I haven't posted the tune, but if you're really in the St. Paddy's Day spirits it'll come to you.