Threkeld, the earliest writer on the wild plants of Ireland, gives Seamar-oge (young trefoil) as the Gaelic name for Trifolium pratense album, and expressly says this is the plant worn by the people in their hats on St. Patrick's Day."

Up to his time it had three names and one of them was Gramen pratense paniculatum majus latiore folio poa theophrasti.

(Phleum pratense var. ?