In _Contributions towards a Cybele Hibernica_ (D. Moore and A. G. More, 1866, p. 73) is the following note: “_Trifolium repens_, Dutch clover, Shamrock.--This is the plant still worn as shamrock on St. Patrick’s Day, though _Medicago lupulina_ is also sold in Dublin as the shamrock. Edward Lhwyd, the celebrated antiquary, writing in December 1699 to Tancred Robinson, says, after a recent visit to Ireland: ‘Their shamrug is our common clover’ (_Phil. Trans._, No. 335). Threkeld, the earliest writer on the wild plants of Ireland, gives _Seamar-oge_ (young trefoil) as the Gaelic name for _Trifolium pratense album_, and says expressly that this is the plant worn by the people in their hats on St. Patrick’s Day. Wade also gives _Seamrog_ as equivalent to _Trifolium repens_, while the Gaelic name given for _Oxalis_ by Threkeld is _Sealgan_.” A correspondent of _N. & Q._ (_4th S._ vol. iii. p. 235) says the _Trifolium filiforme_ is generally worn in Cork. It grows in thick clusters on the tops of walls and ditches, and is to be found in abundance in old limestone quarries in the south of Ireland. The _Trifolium minus_ is also worn. The following whimsical song descriptive of St. Patrick is given on Hone’s authority as one often sung by the Irish: St. Patrick was a gentleman, and he came from decent people, In Dublin town he built a church, and on it put a steeple; His father was a Wollaghan, his mother an O’Grady, His aunt she was a Kinaghan, and his wife a widow Brady. Tooralloo, tooralloo, what a glorious man our saint was! Tooralloo, tooralloo, O whack fal de lal, de lal, etc. Och! Antrim hills are mighty high, and so’s the hill of Howth too; But we all do know a mountain that is higher than them both too; ’Twas on the top of that high mount St. Patrick preach’d a sermon. He drove the frogs into the bogs, and banished all the vermin. Tooralloo, tooralloo, etc. No wonder that we Irish lads, then, are so blythe and frisky; St. Patrick was the very man that taught us to drink whisky; Och! to be sure he had the knack, and understood distilling, For his mother kept a sheebeen shop near the town of Enniskillen. Tooralloo, tooralloo, etc.-- _Every Day Book_, vol. ii. p. 387. It is customary early in February for wealthy farmers and landowners in Ireland to brew ale to be kept till the 17th of March, St. Patrick’s Day; and there is a delicious cake made this day, to be eaten with pickled salmon.--_N. & Q. 3rd S._ vol. ix. p. 367.